Friday, August 10, 2012

1305

1305 = 3 x 3 x 5 x 29.

1305 has two representations as a sum of two squares: 1305 = 32 + 362 = 242 + 272.

1305 is the number of graphs with 11 vertices and 9 edges.

1305 is 909 in base 12.

1305 is a number n such that n2 (1703025) can be obtained by inserting internal (but not necessarily contiguous) digits (A046851).


Source: What's Special About This Number?

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