12917685 has 32 divisors (see below), whose sum is σ = 22855680. Its totient is φ = 6177600.

The previous prime is 12917677. The next prime is 12917693. The reversal of 12917685 is 58671921.

It is an interprime number because it is at equal distance from previous prime (12917677) and next prime (12917693).

It is not a de Polignac number, because 12917685 - 2³ = 12917677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12540 + ... + 13530.

It is an arithmetic number, because the mean of its divisors is an integer number (714240).

Almost surely, 2^12917685 is an apocalyptic number.

12917685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12917685 is a deficient number, since it is larger than the sum of its proper divisors (9937995).

12917685 is a wasteful number, since it uses less digits than its factorization.

12917685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089.

The product of its digits is 30240, while the sum is 39.

The square root of 12917685 is about 3594.1181115818. The cubic root of 12917685 is about 234.6361352521.

The spelling of 12917685 in words is "twelve million, nine hundred seventeen thousand, six hundred eighty-five".