12917515 has 12 divisors (see below), whose sum is σ = 16786224. Its totient is φ = 9538464.

The previous prime is 12917507. The next prime is 12917563. The reversal of 12917515 is 51571921.

It is not a de Polignac number, because 12917515 - 2³ = 12917507 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6799 + ... + 8488.

It is an arithmetic number, because the mean of its divisors is an integer number (1398852).

Almost surely, 2^12917515 is an apocalyptic number.

12917515 is a deficient number, since it is larger than the sum of its proper divisors (3868709).

12917515 is a wasteful number, since it uses less digits than its factorization.

12917515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15318 (or 15305 counting only the distinct ones).

The product of its digits is 3150, while the sum is 31.

The square root of 12917515 is about 3594.0944617525. The cubic root of 12917515 is about 234.6351059573.

The spelling of 12917515 in words is "twelve million, nine hundred seventeen thousand, five hundred fifteen".