1320920975 has 24 divisors (see below), whose sum is σ = 1789556592. Its totient is φ = 959212800.

The previous prime is 1320920959. The next prime is 1320920977. The reversal of 1320920975 is 5790290231.

It is not a de Polignac number, because 1320920975 - 2⁴ = 1320920959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320920977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198299 + ... + 204851.

It is an arithmetic number, because the mean of its divisors is an integer number (74564858).

Almost surely, 2^1320920975 is an apocalyptic number.

1320920975 is a deficient number, since it is larger than the sum of its proper divisors (468635617).

1320920975 is a wasteful number, since it uses less digits than its factorization.

1320920975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7307 (or 7302 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 1320920975 is about 36344.4765404593. The cubic root of 1320920975 is about 1097.2163708590.

The spelling of 1320920975 in words is "one billion, three hundred twenty million, nine hundred twenty thousand, nine hundred seventy-five".