12631681 has 8 divisors (see below), whose sum is σ = 12960000. Its totient is φ = 12307680.

The previous prime is 12631679. The next prime is 12631693. The reversal of 12631681 is 18613621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12631681 - 2¹ = 12631679 is a prime.

It is a super-2 number, since 2×12631681² = 319118729771522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12631621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5320 + ... + 7318.

It is an arithmetic number, because the mean of its divisors is an integer number (1620000).

Almost surely, 2^12631681 is an apocalyptic number.

It is an amenable number.

12631681 is a deficient number, since it is larger than the sum of its proper divisors (328319).

12631681 is an equidigital number, since it uses as much as digits as its factorization.

12631681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159.

The product of its digits is 1728, while the sum is 28.

The square root of 12631681 is about 3554.1076235815. The cubic root of 12631681 is about 232.8915420487.

The spelling of 12631681 in words is "twelve million, six hundred thirty-one thousand, six hundred eighty-one".