12856736 has 12 divisors (see below), whose sum is σ = 25311762. Its totient is φ = 6428352.

The previous prime is 12856729. The next prime is 12856741. The reversal of 12856736 is 63765821.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 211600 = 3556^2 + 460^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12856736.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200855 + ... + 200918.

Almost surely, 2^12856736 is an apocalyptic number.

12856736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12856736 is a deficient number, since it is larger than the sum of its proper divisors (12455026).

12856736 is an equidigital number, since it uses as much as digits as its factorization.

12856736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401783 (or 401775 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 12856736 is about 3585.6290940364. The cubic root of 12856736 is about 234.2665285555.

The spelling of 12856736 in words is "twelve million, eight hundred fifty-six thousand, seven hundred thirty-six".