12691486 has 16 divisors (see below), whose sum is σ = 20540304. Its totient is φ = 5858944.

The previous prime is 12691451. The next prime is 12691501. The reversal of 12691486 is 68419621.

It is a happy number.

It is a super-2 number, since 2×12691486² = 322147633776392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720 + ... + 5323.

It is an arithmetic number, because the mean of its divisors is an integer number (1283769).

Almost surely, 2^12691486 is an apocalyptic number.

12691486 is a deficient number, since it is larger than the sum of its proper divisors (7848818).

12691486 is a wasteful number, since it uses less digits than its factorization.

12691486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7115.

The product of its digits is 20736, while the sum is 37.

The square root of 12691486 is about 3562.5111929649. The cubic root of 12691486 is about 233.2585070727.

The spelling of 12691486 in words is "twelve million, six hundred ninety-one thousand, four hundred eighty-six".