1312115239 has 4 divisors (see below), whose sum is σ = 1312306920. Its totient is φ = 1311923560.

The previous prime is 1312115227. The next prime is 1312115261. The reversal of 1312115239 is 9325112131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312115239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312115209) 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, 85177 + ... + 99394.

It is an arithmetic number, because the mean of its divisors is an integer number (328076730).

Almost surely, 2^1312115239 is an apocalyptic number.

1312115239 is a deficient number, since it is larger than the sum of its proper divisors (191681).

1312115239 is an equidigital number, since it uses as much as digits as its factorization.

1312115239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191680.

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

The square root of 1312115239 is about 36223.1312699496. The cubic root of 1312115239 is about 1094.7727860608.

The spelling of 1312115239 in words is "one billion, three hundred twelve million, one hundred fifteen thousand, two hundred thirty-nine".