520605025 has 12 divisors (see below), whose sum is σ = 683524332. Its totient is φ = 391984640.

The previous prime is 520605011. The next prime is 520605031. The reversal of 520605025 is 520506025.

It can be written as a sum of positive squares in 6 ways, for example, as 23493409 + 497111616 = 4847^2 + 22296^2 .

It is not a de Polignac number, because 520605025 - 2¹⁵ = 520572257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612052 + ... + 612901.

It is an arithmetic number, because the mean of its divisors is an integer number (56960361).

Almost surely, 2^520605025 is an apocalyptic number.

It is an amenable number.

520605025 is a deficient number, since it is larger than the sum of its proper divisors (162919307).

520605025 is a wasteful number, since it uses less digits than its factorization.

520605025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224980 (or 1224975 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 520605025 is about 22816.7706961349. The cubic root of 520605025 is about 804.4569077108.

The spelling of 520605025 in words is "five hundred twenty million, six hundred five thousand, twenty-five".