1312580685 has 16 divisors (see below), whose sum is σ = 2261677824. Its totient is φ = 646193472.

The previous prime is 1312580681. The next prime is 1312580699. The reversal of 1312580685 is 5860852131.

It is not a de Polignac number, because 1312580685 - 2² = 1312580681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312580681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3365397 + ... + 3365786.

It is an arithmetic number, because the mean of its divisors is an integer number (141354864).

Almost surely, 2^1312580685 is an apocalyptic number.

1312580685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312580685 is a deficient number, since it is larger than the sum of its proper divisors (949097139).

1312580685 is a wasteful number, since it uses less digits than its factorization.

1312580685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6731204.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1312580685 is about 36229.5554071534. Note that the first 3 decimals coincide. The cubic root of 1312580685 is about 1094.9022201632.

The spelling of 1312580685 in words is "one billion, three hundred twelve million, five hundred eighty thousand, six hundred eighty-five".