12912131 has 8 divisors (see below), whose sum is σ = 13665024. Its totient is φ = 12175240.

The previous prime is 12912103. The next prime is 12912139. The reversal of 12912131 is 13121921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12912131 is a prime.

It is a super-2 number, since 2×12912131² = 333446253922322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12912139) 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, 2321 + ... + 5586.

It is an arithmetic number, because the mean of its divisors is an integer number (1708128).

Almost surely, 2^12912131 is an apocalyptic number.

12912131 is a deficient number, since it is larger than the sum of its proper divisors (752893).

12912131 is an equidigital number, since it uses as much as digits as its factorization.

12912131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001.

The product of its digits is 108, while the sum is 20.

The square root of 12912131 is about 3593.3453772216. The cubic root of 12912131 is about 234.6025029125.

The spelling of 12912131 in words is "twelve million, nine hundred twelve thousand, one hundred thirty-one".