1321984564 has 12 divisors (see below), whose sum is σ = 2314137924. Its totient is φ = 660802304.

The previous prime is 1321984523. The next prime is 1321984567. The reversal of 1321984564 is 4654891231.

It can be written as a sum of positive squares in 2 ways, for example, as 650760100 + 671224464 = 25510^2 + 25908^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1321984564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321984567) 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, 31219 + ... + 60154.

It is an arithmetic number, because the mean of its divisors is an integer number (192844827).

Almost surely, 2^1321984564 is an apocalyptic number.

It is an amenable number.

1321984564 is a deficient number, since it is larger than the sum of its proper divisors (992153360).

1321984564 is a wasteful number, since it uses less digits than its factorization.

1321984564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94994 (or 94992 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 1321984564 is about 36359.1056545675. The cubic root of 1321984564 is about 1097.5107801412.

The spelling of 1321984564 in words is "one billion, three hundred twenty-one million, nine hundred eighty-four thousand, five hundred sixty-four".