520785 has 24 divisors (see below), whose sum is σ = 921024. Its totient is φ = 272160.

The previous prime is 520763. The next prime is 520787. The reversal of 520785 is 587025.

It is a happy number.

It is not a de Polignac number, because 520785 - 2⁶ = 520721 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520787) 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, 3114 + ... + 3276.

It is an arithmetic number, because the mean of its divisors is an integer number (38376).

2⁵²⁰⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

520785 is a deficient number, since it is larger than the sum of its proper divisors (400239).

520785 is a wasteful number, since it uses less digits than its factorization.

520785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 520785 is about 721.6543493945. The cubic root of 520785 is about 80.4549598231.

The spelling of 520785 in words is "five hundred twenty thousand, seven hundred eighty-five".