12631081 has 4 divisors (see below), whose sum is σ = 12638592. Its totient is φ = 12623572.

The previous prime is 12631079. The next prime is 12631111. The reversal of 12631081 is 18013621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12631081 - 2¹ = 12631079 is a prime.

It is a super-2 number, since 2×12631081² = 319088414457122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12631001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60 + ... + 5026.

It is an arithmetic number, because the mean of its divisors is an integer number (3159648).

Almost surely, 2^12631081 is an apocalyptic number.

It is an amenable number.

12631081 is a deficient number, since it is larger than the sum of its proper divisors (7511).

12631081 is an equidigital number, since it uses as much as digits as its factorization.

12631081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7510.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 12631081 is about 3554.0232132050. The cubic root of 12631081 is about 232.8878545707.

The spelling of 12631081 in words is "twelve million, six hundred thirty-one thousand, eighty-one".