Thursday, May 6, 2010

745

745 = 5 x 149.

745 has two representations as a sum of two squares: 745 = 42 + 272 = 132 + 242.

745 is the hypotenuse of two Pythagorean triples: 7452 = 2162 + 7132 = 4072 + 6242.

745 is a divisor of 444 - 1.

745 is the smallest number whose square begins with three 5s: 7452 = 555,025.

The German submarine U-745 was lost at sea on Jan. 30, 1945.

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