12667431 has 48 divisors (see below), whose sum is σ = 21521376. Its totient is φ = 6580224.

The previous prime is 12667427. The next prime is 12667439. The reversal of 12667431 is 13476621.

It is not a de Polignac number, because 12667431 - 2² = 12667427 is a prime.

It is a super-2 number, since 2×12667431² = 320927616279522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12667439) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92395 + ... + 92531.

It is an arithmetic number, because the mean of its divisors is an integer number (448362).

Almost surely, 2^12667431 is an apocalyptic number.

12667431 is a deficient number, since it is larger than the sum of its proper divisors (8853945).

12667431 is a wasteful number, since it uses less digits than its factorization.

12667431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 201 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 12667431 is about 3559.1334619539. The cubic root of 12667431 is about 233.1110438545. Note that the first 3 decimals are identical.

The spelling of 12667431 in words is "twelve million, six hundred sixty-seven thousand, four hundred thirty-one".