12805256 has 16 divisors (see below), whose sum is σ = 24659340. Its totient is φ = 6229440.

The previous prime is 12805237. The next prime is 12805279. The reversal of 12805256 is 65250821.

It can be written as a sum of positive squares in 2 ways, for example, as 12013156 + 792100 = 3466^2 + 890^2 .

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, 21335 + ... + 21926.

Almost surely, 2^12805256 is an apocalyptic number.

It is an amenable number.

12805256 is a deficient number, since it is larger than the sum of its proper divisors (11854084).

12805256 is a wasteful number, since it uses less digits than its factorization.

12805256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43304 (or 43300 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 12805256 is about 3578.4432369398. The cubic root of 12805256 is about 233.9534326698.

It can be divided in two parts, 12805 and 256, that multiplied together give a triangular number (3278080 = T₂₅₆₀).

The spelling of 12805256 in words is "twelve million, eight hundred five thousand, two hundred fifty-six".