509925121 has 2 divisors, whose sum is σ = 509925122. Its totient is φ = 509925120.

The previous prime is 509925113. The next prime is 509925133. The reversal of 509925121 is 121529905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458602225 + 51322896 = 21415^2 + 7164^2 .

It is a cyclic number.

It is not a de Polignac number, because 509925121 - 2³ = 509925113 is a prime.

It is not a weakly prime, because it can be changed into another prime (509925161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254962560 + 254962561.

It is an arithmetic number, because the mean of its divisors is an integer number (254962561).

Almost surely, 2^509925121 is an apocalyptic number.

It is an amenable number.

509925121 is a deficient number, since it is larger than the sum of its proper divisors (1).

509925121 is an equidigital number, since it uses as much as digits as its factorization.

509925121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 509925121 is about 22581.5216714906. The cubic root of 509925121 is about 798.9178707595.

The spelling of 509925121 in words is "five hundred nine million, nine hundred twenty-five thousand, one hundred twenty-one".