520365 has 16 divisors (see below), whose sum is σ = 842688. Its totient is φ = 274176.

The previous prime is 520363. The next prime is 520369. The reversal of 520365 is 563025.

It is not a de Polignac number, because 520365 - 2¹ = 520363 is a prime.

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 520365.

It is not an unprimeable number, because it can be changed into a prime (520361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1542 + ... + 1848.

It is an arithmetic number, because the mean of its divisors is an integer number (52668).

2⁵²⁰³⁶⁵ is an apocalyptic number.

It is an amenable number.

520365 is a deficient number, since it is larger than the sum of its proper divisors (322323).

520365 is a wasteful number, since it uses less digits than its factorization.

520365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 520365 is about 721.3632926619. The cubic root of 520365 is about 80.4333257059.

The spelling of 520365 in words is "five hundred twenty thousand, three hundred sixty-five".