1321119520 has 48 divisors (see below), whose sum is σ = 3567025728. Its totient is φ = 452954880.

The previous prime is 1321119497. The next prime is 1321119557. The reversal of 1321119520 is 259111231.

It is a super-2 number, since 2×1321119520² = 3490713572250060800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588666 + ... + 590905.

It is an arithmetic number, because the mean of its divisors is an integer number (74313036).

Almost surely, 2^1321119520 is an apocalyptic number.

1321119520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321119520 is an abundant number, since it is smaller than the sum of its proper divisors (2245906208).

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

1321119520 is a wasteful number, since it uses less digits than its factorization.

1321119520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179593 (or 1179585 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 1321119520 is about 36347.2078707567. The cubic root of 1321119520 is about 1097.2713415738.

The spelling of 1321119520 in words is "one billion, three hundred twenty-one million, one hundred nineteen thousand, five hundred twenty".