1312651670 has 32 divisors (see below), whose sum is σ = 2713236480. Its totient is φ = 452204640.

The previous prime is 1312651667. The next prime is 1312651709. The reversal of 1312651670 is 761562131.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311942 + ... + 316121.

It is an arithmetic number, because the mean of its divisors is an integer number (84788640).

Almost surely, 2^1312651670 is an apocalyptic number.

1312651670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312651670 is an abundant number, since it is smaller than the sum of its proper divisors (1400584810).

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

1312651670 is a wasteful number, since it uses less digits than its factorization.

1312651670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628100.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1312651670 is about 36230.5350498720. The cubic root of 1312651670 is about 1094.9219574217.

The spelling of 1312651670 in words is "one billion, three hundred twelve million, six hundred fifty-one thousand, six hundred seventy".