12956131 has 2 divisors, whose sum is σ = 12956132. Its totient is φ = 12956130.

The previous prime is 12956117. The next prime is 12956137. The reversal of 12956131 is 13165921.

It is a strong prime.

It is an emirp because it is prime and its reverse (13165921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12956131 - 2⁷ = 12956003 is a prime.

It is a super-2 number, since 2×12956131² = 335722660978322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12956131.

It is not a weakly prime, because it can be changed into another prime (12956137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478065 + 6478066.

It is an arithmetic number, because the mean of its divisors is an integer number (6478066).

Almost surely, 2^12956131 is an apocalyptic number.

12956131 is the 2277-th centered pentagonal number.

12956131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12956131 is an equidigital number, since it uses as much as digits as its factorization.

12956131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 12956131 is about 3599.4625987778. The cubic root of 12956131 is about 234.8686817257.

The spelling of 12956131 in words is "twelve million, nine hundred fifty-six thousand, one hundred thirty-one".