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Reverso (Posted on 2014-02-27) Difficulty: 3 of 5
Let f(n) denote the largest prime factor of n which is not a palindrome.

Find all the numbers n (below 20000) such that the sum of the factorials of the digits of n is equal to f(n) reversed.

Example: 2105 = 5*421 and 2!+1!+0!+5! = 124.

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
Solutioncomputer solutionCharlie2014-02-27 17:05:19
SolutionSolutiontomarken2014-02-27 15:50:36
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