520725 has 24 divisors (see below), whose sum is σ = 883872. Its totient is φ = 270400.

The previous prime is 520721. The next prime is 520747. The reversal of 520725 is 527025.

It is not a de Polignac number, because 520725 - 2² = 520721 is a prime.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 520725.

It is not an unprimeable number, because it can be changed into a prime (520721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3910 + ... + 4040.

It is an arithmetic number, because the mean of its divisors is an integer number (36828).

2⁵²⁰⁷²⁵ is an apocalyptic number.

It is an amenable number.

520725 is a deficient number, since it is larger than the sum of its proper divisors (363147).

520725 is a wasteful number, since it uses less digits than its factorization.

520725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 520725 is about 721.6127770487. The cubic root of 520725 is about 80.4518699472.

Subtracting from 520725 its product of nonzero digits (700), we obtain a palindrome (520025).

The spelling of 520725 in words is "five hundred twenty thousand, seven hundred twenty-five".