1312320412 has 24 divisors (see below), whose sum is σ = 2558505600. Its totient is φ = 584799936.

The previous prime is 1312320349. The next prime is 1312320419. The reversal of 1312320412 is 2140232131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312320412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312320419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433612 + ... + 436627.

It is an arithmetic number, because the mean of its divisors is an integer number (106604400).

Almost surely, 2^1312320412 is an apocalyptic number.

It is an amenable number.

1312320412 is a deficient number, since it is larger than the sum of its proper divisors (1246185188).

1312320412 is a wasteful number, since it uses less digits than its factorization.

1312320412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870285 (or 870283 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1312320412 is about 36225.9632308100. The cubic root of 1312320412 is about 1094.8298456095.

Adding to 1312320412 its reverse (2140232131), we get a palindrome (3452552543).

The spelling of 1312320412 in words is "one billion, three hundred twelve million, three hundred twenty thousand, four hundred twelve".