12401631 has 12 divisors (see below), whose sum is σ = 19542120. Its totient is φ = 7516080.

The previous prime is 12401593. The next prime is 12401671. The reversal of 12401631 is 13610421.

It is a happy number.

It is not a de Polignac number, because 12401631 - 2²² = 8207327 is a prime.

It is a super-2 number, since 2×12401631² = 307600902920322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12401671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62536 + ... + 62733.

It is an arithmetic number, because the mean of its divisors is an integer number (1628510).

Almost surely, 2^12401631 is an apocalyptic number.

12401631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12401631 is a deficient number, since it is larger than the sum of its proper divisors (7140489).

12401631 is a wasteful number, since it uses less digits than its factorization.

12401631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125286 (or 125283 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12401631 is about 3521.5949511549. The cubic root of 12401631 is about 231.4690531118.

The spelling of 12401631 in words is "twelve million, four hundred one thousand, six hundred thirty-one".