12691568 has 20 divisors (see below), whose sum is σ = 24724608. Its totient is φ = 6311040.

The previous prime is 12691541. The next prime is 12691583. The reversal of 12691568 is 86519621.

It is a super-2 number, since 2×12691568² = 322151796597248, which contains 22 as substring.

It is a zygodrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980 + ... + 5132.

Almost surely, 2^12691568 is an apocalyptic number.

It is an amenable number.

12691568 is a deficient number, since it is larger than the sum of its proper divisors (12033040).

12691568 is a wasteful number, since it uses less digits than its factorization.

12691568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352 (or 4346 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 12691568 is about 3562.5227016821. The cubic root of 12691568 is about 233.2590094346.

The spelling of 12691568 in words is "twelve million, six hundred ninety-one thousand, five hundred sixty-eight".