12689156 has 6 divisors (see below), whose sum is σ = 22206030. Its totient is φ = 6344576.

The previous prime is 12689147. The next prime is 12689167. The reversal of 12689156 is 65198621.

It can be written as a sum of positive squares in only one way, i.e., 11669056 + 1020100 = 3416^2 + 1010^2 .

It is a super-2 number, since 2×12689156² = 322029359984672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1586141 + ... + 1586148.

It is an arithmetic number, because the mean of its divisors is an integer number (3701005).

Almost surely, 2^12689156 is an apocalyptic number.

It is an amenable number.

12689156 is a deficient number, since it is larger than the sum of its proper divisors (9516874).

12689156 is a wasteful number, since it uses less digits than its factorization.

12689156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172293 (or 3172291 counting only the distinct ones).

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

The square root of 12689156 is about 3562.1841614380. The cubic root of 12689156 is about 233.2442317393.

The spelling of 12689156 in words is "twelve million, six hundred eighty-nine thousand, one hundred fifty-six".