425 = 52 x 17.
425 has three representations as a sum of two squares: 425 = 52 + 202 = 82 + 192 = 132 + 162.
425 is the hypotenuse of two primitive Pythagorean triples: 4252 = 872 + 4162 = 2972 + 3042.
425 is the number of subsets of {1, 2, 3, . . . 11} that have an integer average.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEDxym7c3rW8M2KmtbA70U8OTs4ry1PygMb2G4F6OjLZ16_7vm1QW2QO8j7i9DSkMlPcku1Rk4N7iRqPWPqmF5GoTo_u_kafdQwZQhSJz9mzYVTVstHetfAjZX_3tyO-me7tQ22ZwyBos/s320/n0425.jpg)
425 is the telephone area code for suburbs to the north and east of Seattle, Washington.
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