4568125921 has 2 divisors, whose sum is σ = 4568125922. Its totient is φ = 4568125920.

The previous prime is 4568125897. The next prime is 4568125927. The reversal of 4568125921 is 1295218654.

4568125921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3900627025 + 667498896 = 62455^2 + 25836^2 .

It is a cyclic number.

It is not a de Polignac number, because 4568125921 - 2⁵ = 4568125889 is a prime.

It is a super-2 number, since 2×4568125921² = 41735548860224196482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4568125927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2284062960 + 2284062961.

It is an arithmetic number, because the mean of its divisors is an integer number (2284062961).

Almost surely, 2^4568125921 is an apocalyptic number.

It is an amenable number.

4568125921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4568125921 is an equidigital number, since it uses as much as digits as its factorization.

4568125921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 43.

The square root of 4568125921 is about 67587.9125361924. The cubic root of 4568125921 is about 1659.2532956804.

The spelling of 4568125921 in words is "four billion, five hundred sixty-eight million, one hundred twenty-five thousand, nine hundred twenty-one".