Answer 1

<< 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! + 4! + 5! = 1 + 24 + 120 = 145 >>

source: http://www.geeksforgeeks.org/check-if-a-number-is-a-krishnamurthy-number-or-not-2/