520388125 has 10 divisors (see below), whose sum is σ = 650277782. Its totient is φ = 416310000.

The previous prime is 520388123. The next prime is 520388147. The reversal of 520388125 is 521883025.

It can be written as a sum of positive squares in 5 ways, for example, as 378730521 + 141657604 = 19461^2 + 11902^2 .

It is not a de Polignac number, because 520388125 - 2¹ = 520388123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520388123) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 415686 + ... + 416935.

Almost surely, 2^520388125 is an apocalyptic number.

It is an amenable number.

520388125 is a deficient number, since it is larger than the sum of its proper divisors (129889657).

520388125 is an frugal number, since it uses more digits than its factorization.

520388125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832641 (or 832626 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 520388125 is about 22812.0171181770. The cubic root of 520388125 is about 804.3451717288.

The spelling of 520388125 in words is "five hundred twenty million, three hundred eighty-eight thousand, one hundred twenty-five".