1320267972 has 36 divisors (see below), whose sum is σ = 3251307696. Its totient is φ = 416925360.

The previous prime is 1320267967. The next prime is 1320267979. The reversal of 1320267972 is 2797620231.

It is a self number, because there is not a number n which added to its sum of digits gives 1320267972.

It is not an unprimeable number, because it can be changed into a prime (1320267979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148054 + ... + 156717.

Almost surely, 2^1320267972 is an apocalyptic number.

1320267972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1320267972 is an abundant number, since it is smaller than the sum of its proper divisors (1931039724).

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

1320267972 is a wasteful number, since it uses less digits than its factorization.

1320267972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304816 (or 304795 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 1320267972 is about 36335.4919052983. The cubic root of 1320267972 is about 1097.0355365034.

The spelling of 1320267972 in words is "one billion, three hundred twenty million, two hundred sixty-seven thousand, nine hundred seventy-two".