12705864 has 16 divisors (see below), whose sum is σ = 31764720. Its totient is φ = 4235280.

The previous prime is 12705863. The next prime is 12705883. The reversal of 12705864 is 46850721.

It is a super-2 number, since 2×12705864² = 322877959972992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12705863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264682 + ... + 264729.

It is an arithmetic number, because the mean of its divisors is an integer number (1985295).

Almost surely, 2^12705864 is an apocalyptic number.

It is an amenable number.

12705864 is an abundant number, since it is smaller than the sum of its proper divisors (19058856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12705864 is a wasteful number, since it uses less digits than its factorization.

12705864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529420 (or 529416 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 12705864 is about 3564.5285803315. The cubic root of 12705864 is about 233.3465588875.

The spelling of 12705864 in words is "twelve million, seven hundred five thousand, eight hundred sixty-four".