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Some nontrivial permutation of digits is a factorial number.
2

%I #6 Sep 19 2012 15:19:17

%S 10,20,42,60,100,102,200,201,204,207,210,240,270,402,420,600,702,1000,

%T 1002,1020,1200,2000,2001,2004,2007,2010,2040,2070,2100,2400,2700,

%U 4002,4005,4020,4050,4200,4500,5004,5400,6000,7002,7020,7200

%N Some nontrivial permutation of digits is a factorial number.

%H F. Smarandache, <a href="http://www.gallup.unm.edu/~smarandache/OPNS.pdf">Only Problems, Not Solutions!</a>

%K nonn,base

%O 1,1

%A R. Muller