12861736 has 16 divisors (see below), whose sum is σ = 24241140. Its totient is φ = 6397440.

The previous prime is 12861731. The next prime is 12861743. The reversal of 12861736 is 63716821.

It can be written as a sum of positive squares in 2 ways, for example, as 12040900 + 820836 = 3470^2 + 906^2 .

It is not an unprimeable number, because it can be changed into a prime (12861731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2505 + ... + 5656.

Almost surely, 2^12861736 is an apocalyptic number.

It is an amenable number.

12861736 is a deficient number, since it is larger than the sum of its proper divisors (11379404).

12861736 is a wasteful number, since it uses less digits than its factorization.

12861736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8364 (or 8360 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 12861736 is about 3586.3262539819. The cubic root of 12861736 is about 234.2968934639.

The spelling of 12861736 in words is "twelve million, eight hundred sixty-one thousand, seven hundred thirty-six".