520642725 has 48 divisors (see below), whose sum is σ = 888193152. Its totient is φ = 268911360.

The previous prime is 520642637. The next prime is 520642739. The reversal of 520642725 is 527246025.

It is not a de Polignac number, because 520642725 - 2¹⁹ = 520118437 is a prime.

It is a congruent number.

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, 1034824 + ... + 1035326.

It is an arithmetic number, because the mean of its divisors is an integer number (18504024).

Almost surely, 2^520642725 is an apocalyptic number.

It is an amenable number.

520642725 is a deficient number, since it is larger than the sum of its proper divisors (367550427).

520642725 is a wasteful number, since it uses less digits than its factorization.

520642725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 520642725 is about 22817.5968278870. The cubic root of 520642725 is about 804.4763256904.

The spelling of 520642725 in words is "five hundred twenty million, six hundred forty-two thousand, seven hundred twenty-five".