520505 has 8 divisors (see below), whose sum is σ = 657600. Its totient is φ = 394416.

The previous prime is 520451. The next prime is 520529. The reversal of 520505 is 505025.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520505 - 2¹⁴ = 504121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2645 + ... + 2834.

It is an arithmetic number, because the mean of its divisors is an integer number (82200).

2⁵²⁰⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

520505 is a deficient number, since it is larger than the sum of its proper divisors (137095).

520505 is a wasteful number, since it uses less digits than its factorization.

520505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503.

The product of its (nonzero) digits is 250, while the sum is 17.

The square root of 520505 is about 721.4603246194. The cubic root of 520505 is about 80.4405383713.

The spelling of 520505 in words is "five hundred twenty thousand, five hundred five".