Tuesday, April 17, 2012

615

615 = 3 x 5 x 41. It is the product of three distinct Sophie Germain primes (A157346).

615 is a hypotenuse for which there exist four distinct integer triangles (A084648).

615 is the sum of seven positive fifth powers (A003352): 615 = 35 + 35 + 25 + 25 + 25 + 25 + 15.

The sum of the even digits of 615 equals the sum of the odd digits of 615 (A036301).


Source: On-Line Encyclopedia of Integer Sequences

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