521545425 has 48 divisors (see below), whose sum is σ = 906876480. Its totient is φ = 264096000.

The previous prime is 521545399. The next prime is 521545433. The reversal of 521545425 is 524545125.

It is not a de Polignac number, because 521545425 - 2⁸ = 521545169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 130710 + ... + 134640.

It is an arithmetic number, because the mean of its divisors is an integer number (18893260).

Almost surely, 2^521545425 is an apocalyptic number.

It is an amenable number.

521545425 is a deficient number, since it is larger than the sum of its proper divisors (385331055).

521545425 is a wasteful number, since it uses less digits than its factorization.

521545425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034 (or 4029 counting only the distinct ones).

The product of its digits is 40000, while the sum is 33.

The square root of 521545425 is about 22837.3690472436. The cubic root of 521545425 is about 804.9409958939.

The spelling of 521545425 in words is "five hundred twenty-one million, five hundred forty-five thousand, four hundred twenty-five".