12691436 has 12 divisors (see below), whose sum is σ = 22236312. Its totient is φ = 6338208.

The previous prime is 12691417. The next prime is 12691451. The reversal of 12691436 is 63419621.

It is a super-2 number, since 2×12691436² = 322145095484192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3896 + ... + 6368.

It is an arithmetic number, because the mean of its divisors is an integer number (1853026).

Almost surely, 2^12691436 is an apocalyptic number.

It is an amenable number.

12691436 is a deficient number, since it is larger than the sum of its proper divisors (9544876).

12691436 is a wasteful number, since it uses less digits than its factorization.

12691436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3760 (or 3758 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 12691436 is about 3562.5041754361. The cubic root of 12691436 is about 233.2582007535.

The spelling of 12691436 in words is "twelve million, six hundred ninety-one thousand, four hundred thirty-six".