12678631 has 16 divisors (see below), whose sum is σ = 14883840. Its totient is φ = 10576800.

The previous prime is 12678623. The next prime is 12678637. The reversal of 12678631 is 13687621.

It is a cyclic number.

It is not a de Polignac number, because 12678631 - 2³ = 12678623 is a prime.

It is a super-2 number, since 2×12678631² = 321495368068322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12678637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55740 + ... + 55966.

It is an arithmetic number, because the mean of its divisors is an integer number (930240).

Almost surely, 2^12678631 is an apocalyptic number.

12678631 is a deficient number, since it is larger than the sum of its proper divisors (2205209).

12678631 is a wasteful number, since it uses less digits than its factorization.

12678631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414.

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

The square root of 12678631 is about 3560.7065310132. The cubic root of 12678631 is about 233.1797258838.

The spelling of 12678631 in words is "twelve million, six hundred seventy-eight thousand, six hundred thirty-one".