520259 has 4 divisors (see below), whose sum is σ = 522816. Its totient is φ = 517704.

The previous prime is 520241. The next prime is 520279. The reversal of 520259 is 952025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520259 - 2¹² = 516163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944 + ... + 1389.

It is an arithmetic number, because the mean of its divisors is an integer number (130704).

2⁵²⁰²⁵⁹ is an apocalyptic number.

520259 is a deficient number, since it is larger than the sum of its proper divisors (2557).

520259 is a wasteful number, since it uses less digits than its factorization.

520259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 520259 is about 721.2898169252. The cubic root of 520259 is about 80.4278638272.

The spelling of 520259 in words is "five hundred twenty thousand, two hundred fifty-nine".