1315

1315 = 5 x 263.

1315 is the middle semiprime of a semiprime triple n - 2, n, n + 2: 1313, 1315, 1317.

1315 is the concatenation of the sixth prime number (13) and the sixth lucky number (15).

The sum of the factorials of the digits of 1315 is a power of 2: 1! + 3! + 1! + 5! = 128 = 2⁷.

1315 is the sum of three consecutive primes: 1315 = 433 + 439 + 443.

Source: On-Line Encyclopedia of Integer Sequences