1321858312 has 16 divisors (see below), whose sum is σ = 2501649360. Its totient is φ = 654751824.

The previous prime is 1321858297. The next prime is 1321858331. The reversal of 1321858312 is 2138581231.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771258 + ... + 772969.

It is an arithmetic number, because the mean of its divisors is an integer number (156353085).

Almost surely, 2^1321858312 is an apocalyptic number.

It is an amenable number.

1321858312 is a deficient number, since it is larger than the sum of its proper divisors (1179791048).

1321858312 is a wasteful number, since it uses less digits than its factorization.

1321858312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544340 (or 1544336 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 1321858312 is about 36357.3694317947. The cubic root of 1321858312 is about 1097.4758409178.

The spelling of 1321858312 in words is "one billion, three hundred twenty-one million, eight hundred fifty-eight thousand, three hundred twelve".