1312987156 has 24 divisors (see below), whose sum is σ = 2497612320. Its totient is φ = 600328032.

The previous prime is 1312987139. The next prime is 1312987187. The reversal of 1312987156 is 6517892131.

It is a congruent number.

It is an unprimeable number.

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, 112426 + ... + 123553.

It is an arithmetic number, because the mean of its divisors is an integer number (104067180).

Almost surely, 2^1312987156 is an apocalyptic number.

It is an amenable number.

1312987156 is a deficient number, since it is larger than the sum of its proper divisors (1184625164).

1312987156 is a wasteful number, since it uses less digits than its factorization.

1312987156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236103 (or 236101 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 1312987156 is about 36235.1646332675. The cubic root of 1312987156 is about 1095.0152291065.

The spelling of 1312987156 in words is "one billion, three hundred twelve million, nine hundred eighty-seven thousand, one hundred fifty-six".