520625 has 30 divisors (see below), whose sum is σ = 801306. Its totient is φ = 336000.

The previous prime is 520621. The next prime is 520631. The reversal of 520625 is 526025.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 132496 + 388129 = 364^2 + 623^2 .

It is not a de Polignac number, because 520625 - 2² = 520621 is a prime.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520597 and 520606.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 520625.

It is not an unprimeable number, because it can be changed into a prime (520621) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 30617 + ... + 30633.

2⁵²⁰⁶²⁵ is an apocalyptic number.

It is an amenable number.

520625 is a deficient number, since it is larger than the sum of its proper divisors (280681).

520625 is an equidigital number, since it uses as much as digits as its factorization.

520625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 520625 is about 721.5434844831. The cubic root of 520625 is about 80.4467196266.

Subtracting from 520625 its product of nonzero digits (600), we obtain a palindrome (520025).

The spelling of 520625 in words is "five hundred twenty thousand, six hundred twenty-five".