# Question: Is 1 A Strong Number?

## What is a strong number in Java?

A strong number is a number in which the sum of the factorial of the digits is equal to the number itself.

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## Is 3 a perfect number?

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.

## How do you find the perfect number?

A number is perfect if the sum of its proper factors is equal to the number. To find the proper factors of a number, write down all numbers that divide the number with the exception of the number itself. If the sum of the factors is equal to 18, then 18 is a perfect number.

## Is 145 a special number?

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!+

## What is Nelson number in Java?

Answer. A nelson number is a number with multiples of 111.

## What is a Krishnamurthy number?

A Krishnamurthy number is a number whose sum of the factorial of digits is equal to the number itself. For example 145, sum of factorial of each digits: 1!

## What are neon numbers?

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

## Is 40585 a strong number?

The sum of the factorial of individual digits of a number is equal to the same number. Sometimes the Strong number also called Krishnamurthy Number. So, 145 is a strong number. … So, 40585 is a strong number.

## What is a special number?

Special Numbers in Java are ones whose sum of factorials of digits is equal to the number itself. It can be an N digit number. The program has to first break the number into its corresponding digits and calculate their factorials. … If the sum matches the original number then the number is called to be a Special number.

## What is factorial number?

Factorial, in mathematics, the product of all positive integers less than or equal to a given positive integer and denoted by that integer and an exclamation point. Thus, factorial seven is written 7!, meaning 1 × 2 × 3 × 4 × 5 × 6 × 7.

## Is 5 a happy number?

The first few happy numbers are 1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100, … … The numbers of iterations required for these to reach 1 are 0, 5, 1, 2, 4, 3, 3, 2, 3, 4, 4, 2, 5, … (OEIS A090425).

## What is a strong number?

Strong number is a number whose sum of all digits’ factorial is equal to the number ‘n’. Factorial implies when we find the product of all the numbers below that number including that number and is denoted by ! (Exclamation sign), For example: 4! = 4x3x2x1 = 24.

## Is 145 a strong number?

Strong numbers are those numbers whose sum of factorial of each digits is equal to the original number. … = 2, 145 is strong number i.e. 1!

## Is Armstrong a number?

Armstrong number is a number that is equal to the sum of cubes of its digits. For example 0, 1, 153, 370, 371 and 407 are the Armstrong numbers. Let’s try to understand why 153 is an Armstrong number.

## What is Fibonacci series in Java?

The Fibonacci series is a series where the next term is the sum of the previous two terms. The first two terms of the Fibonacci sequence are 0 followed by 1. The Fibonacci sequence: 0, 1, 1, 2, 3, 5, 8, 13, 21, …