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?