520256 has 28 divisors (see below), whose sum is σ = 1127760. Its totient is φ = 236160.

The previous prime is 520241. The next prime is 520279. The reversal of 520256 is 652025.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335 + ... + 1073.

2⁵²⁰²⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563880).

520256 is an abundant number, since it is smaller than the sum of its proper divisors (607504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520256 is a wasteful number, since it uses less digits than its factorization.

520256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 520256 is about 721.2877373143. The cubic root of 520256 is about 80.4277092350.

Subtracting 520256 from its reverse (652025), we obtain a square (131769 = 363²).

The spelling of 520256 in words is "five hundred twenty thousand, two hundred fifty-six".