1320261312 has 28 divisors (see below), whose sum is σ = 3493191896. Its totient is φ = 440087040.

The previous prime is 1320261311. The next prime is 1320261317. The reversal of 1320261312 is 2131620231.

It is a super-2 number, since 2×1320261312² = 3486179863927922688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1320261311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3437989 + ... + 3438372.

Almost surely, 2^1320261312 is an apocalyptic number.

1320261312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1320261312 is an abundant number, since it is smaller than the sum of its proper divisors (2172930584).

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

1320261312 is an equidigital number, since it uses as much as digits as its factorization.

1320261312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876376 (or 6876366 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1320261312 is about 36335.4002592513. The cubic root of 1320261312 is about 1097.0336918604.

Adding to 1320261312 its reverse (2131620231), we get a palindrome (3451881543).

The spelling of 1320261312 in words is "one billion, three hundred twenty million, two hundred sixty-one thousand, three hundred twelve".