1312905792 has 56 divisors (see below), whose sum is σ = 3789529632. Its totient is φ = 397849600.

The previous prime is 1312905791. The next prime is 1312905793. The reversal of 1312905792 is 2975092131.

It is an interprime number because it is at equal distance from previous prime (1312905791) and next prime (1312905793).

It is a self number, because there is not a number n which added to its sum of digits gives 1312905792.

It is not an unprimeable number, because it can be changed into a prime (1312905791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308709 + ... + 312932.

It is an arithmetic number, because the mean of its divisors is an integer number (67670172).

Almost surely, 2^1312905792 is an apocalyptic number.

1312905792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312905792 is an abundant number, since it is smaller than the sum of its proper divisors (2476623840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312905792 is a wasteful number, since it uses less digits than its factorization.

1312905792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621667 (or 621657 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 1312905792 is about 36234.0418943292. The cubic root of 1312905792 is about 1094.9926097789.

The spelling of 1312905792 in words is "one billion, three hundred twelve million, nine hundred five thousand, seven hundred ninety-two".