1321160976 has 160 divisors (see below), whose sum is σ = 3999744000. Its totient is φ = 416914560.

The previous prime is 1321160969. The next prime is 1321160977. The reversal of 1321160976 is 6790611231.

1321160976 is a `hidden beast` number, since 1 + 32 + 11 + 609 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1321160976.

It is not an unprimeable number, because it can be changed into a prime (1321160977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 628375 + ... + 630473.

It is an arithmetic number, because the mean of its divisors is an integer number (24998400).

Almost surely, 2^1321160976 is an apocalyptic number.

1321160976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321160976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1999872000).

1321160976 is an abundant number, since it is smaller than the sum of its proper divisors (2678583024).

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

1321160976 is a wasteful number, since it uses less digits than its factorization.

1321160976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1321160976 is about 36347.7781439251. The cubic root of 1321160976 is about 1097.2828187098.

The spelling of 1321160976 in words is "one billion, three hundred twenty-one million, one hundred sixty thousand, nine hundred seventy-six".