12791131 has 2 divisors, whose sum is σ = 12791132. Its totient is φ = 12791130.

The previous prime is 12791113. The next prime is 12791137. The reversal of 12791131 is 13119721.

12791131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (12791113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12791131 is a prime.

It is a super-2 number, since 2×12791131² = 327226064518322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12791096 and 12791105.

It is not a weakly prime, because it can be changed into another prime (12791137) 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, 6395565 + 6395566.

It is an arithmetic number, because the mean of its divisors is an integer number (6395566).

Almost surely, 2^12791131 is an apocalyptic number.

12791131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12791131 is an equidigital number, since it uses as much as digits as its factorization.

12791131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 25.

The square root of 12791131 is about 3576.4690687884. The cubic root of 12791131 is about 233.8673792545.

The spelling of 12791131 in words is "twelve million, seven hundred ninety-one thousand, one hundred thirty-one".