# What Is The Special Number In Java?

## What is a neon number in Java?

A neon number is a number where the sum of digits of square of the number is equal to the number.

The task is to check and print neon numbers in a range.

Examples: Input : 9 Output : Neon Number Explanation: square is 9*9 = 81 and sum of the digits of the square is 9..

## Why is 6 a special number?

6 is related to the Mersenne prime 3, since 21(22 – 1) = 6. (The next perfect number is 28.) 6 is the only even perfect number that is not the sum of successive odd cubes. 6 is the root of the 6-aliquot tree, and is itself the aliquot sum of only one number; the square number, 25.

## How do you find Automorphic numbers?

Steps to Check Automorphic Number in JavaTake a number as input (num).Square the number (sqr).Count the number of digits of (num) using while loop (c).Compare the last (c) digits of (sqr) with the (num).If they are equal then the number is Automorphic else not.

## Is 51 a Harshad number?

Harshad numbers in base 10 form the sequence: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 18, 20, 21, 24, 27, 30, 36, 40, 42, 45, 48, 50, 54, 60, 63, 70, 72, 80, 81, 84, 90, 100, 102, 108, 110, 111, 112, 114, 117, 120, 126, 132, 133, 135, 140, 144, 150, 152, 153, 156, 162, 171, 180, 190, 192, 195, 198, 200, …

## What is Krishnamurthy number in Java?

What is a Krishnamurthy Number? If the sum of the factorial of all digits of a number is equal to the original number then the number is called Krishnamurthy Number. For example:- 145 and 40585 are Krishnamurthy numbers. 1 and 2 are also Krishnamurthy numbers because their factorials are equal to the same number.

## What is a Niven number in Java?

Harshad Number : In recreational mathematics, a Harshad number (or Niven number), is an integer (in base 10) that is divisible by the sum of its digits. … The number 18 is a Harshad number in base 10, because the sum of the digits 1 and 8 is 9 (1 + 8 = 9), and 18 is divisible by 9 (since 18 % 9 = 0)

## What is a special number example?

A number is said to be special number when the sum of factorial of its digits is equal to the number itself. Example- 145 is a Special Number as 1!+ 4!+ 5!=

## What is the most special number?

Therefore the number 6174 is the only number unchanged by Kaprekar’s operation — our mysterious number is unique. The number 495 is the unique kernel for the operation on three digit numbers, and all three digit numbers reach 495 using the operation.

## What is a special number in computer?

A special two-digit number is such that when the sum of its digits is added to the product of its digits, the result is equal to the original two-digit number. Example: Consider the number 59. Sum of digits = 5 + 9 = 14. Product of its digits = 5 x 9 = 45.

## Which is a special number?

A number is known as Special number when sum of the factorial of digits is equal to the original number (given number). Examples: Below are examples of numbers which are Special. Number to check : 145 1! + 4!

## What is a perfect number in maths?

Perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128. The discovery of such numbers is lost in prehistory.

## What is magic number in Java?

A number is said to be a Magic number if the sum of its digits are calculated till a single digit is obtained by recursively adding the sum of its digits. If the single digit comes to be 1 then the number is a magic number.

## How can I find my Harshad number?

A number is said to be the Harshad number if it is divisible by the sum of its digit. For example, if number is 156, then sum of its digit will be 1 + 5 + 6 = 12. Since 156 is divisible by 12. So, 156 is a Harshad number.

## Why 1 is a special number?

The number one is far more special than a prime! It is the unit (the building block) of the positive integers, hence the only integer which merits its own existence axiom in Peano’s axioms. … It is the only perfect nth power for all positive integers n. It is the only positive integer with exactly one positive divisor.

## Why is 9 a special number?

The number 9 is revered in Hinduism and considered a complete, perfected and divine number because it represents the end of a cycle in the decimal system, which originated from the Indian subcontinent as early as 3000 BC. … Nine is a significant number in Norse Mythology.

## How many special numbers are there?

12, 18, 20, 24, 30, 36, 40, 42, 48, 54, 56, 60, 66, 70, 72, 78, 80, 84, 88, 90, 96, 100, 102, … As an example, consider the number 24. Its divisors are 1, 2, 3, 4, 6, 8, 12 and 24, whose sum is 60. Because 60 is more than 2 × 24, the number 24 is abundant.

## What is Peterson number?

A number is said to be a Peterson number if the sum of factorials of each digit of the number is equal to the number itself. Example: Input : n = 145 Output = Yes Explanation: 145 = 5!

## Is perfect number Java?

This is a Java Program to Check if a given Number is Perfect Number. A perfect number is a positive integer that is equal to the sum of its proper positive divisors excluding the number itself. Enter any integer as an input. … The Java program is successfully compiled and run on a Windows system.