1321591360 has 56 divisors (see below), whose sum is σ = 3312688320. Its totient is φ = 500811264.

The previous prime is 1321591331. The next prime is 1321591421. The reversal of 1321591360 is 631951231.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102604 + ... + 114763.

Almost surely, 2^1321591360 is an apocalyptic number.

1321591360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321591360 is an abundant number, since it is smaller than the sum of its proper divisors (1991096960).

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

1321591360 is a wasteful number, since it uses less digits than its factorization.

1321591360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217403 (or 217393 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 1321591360 is about 36353.6980237224. The cubic root of 1321591360 is about 1097.4019567774.

The spelling of 1321591360 in words is "one billion, three hundred twenty-one million, five hundred ninety-one thousand, three hundred sixty".