7960921 has 12 divisors (see below), whose sum is σ = 8460900. Its totient is φ = 7488800.

The previous prime is 7960903. The next prime is 7960969. The reversal of 7960921 is 1290697.

It can be written as a sum of positive squares in 2 ways, for example, as 4575321 + 3385600 = 2139^2 + 1840^2 .

It is not a de Polignac number, because 7960921 - 2⁷ = 7960793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7960991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53355 + ... + 53503.

It is an arithmetic number, because the mean of its divisors is an integer number (705075).

Almost surely, 2^7960921 is an apocalyptic number.

It is an amenable number.

7960921 is a deficient number, since it is larger than the sum of its proper divisors (499979).

7960921 is a wasteful number, since it uses less digits than its factorization.

7960921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 7960921 is about 2821.5104111096. The cubic root of 7960921 is about 199.6738099562.

The spelling of 7960921 in words is "seven million, nine hundred sixty thousand, nine hundred twenty-one".