1312256464 has 20 divisors (see below), whose sum is σ = 2543086240. Its totient is φ = 655976160.

The previous prime is 1312256419. The next prime is 1312256483. The reversal of 1312256464 is 4646522131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99709 + ... + 112099.

It is an arithmetic number, because the mean of its divisors is an integer number (127154312).

Almost surely, 2^1312256464 is an apocalyptic number.

It is an amenable number.

1312256464 is a deficient number, since it is larger than the sum of its proper divisors (1230829776).

1312256464 is a wasteful number, since it uses less digits than its factorization.

1312256464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19018 (or 19012 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 1312256464 is about 36225.0805934231. The cubic root of 1312256464 is about 1094.8120620166.

Adding to 1312256464 its reverse (4646522131), we get a palindrome (5958778595).

The spelling of 1312256464 in words is "one billion, three hundred twelve million, two hundred fifty-six thousand, four hundred sixty-four".