520859 has 4 divisors (see below), whose sum is σ = 533016. Its totient is φ = 508704.

The previous prime is 520853. The next prime is 520867. The reversal of 520859 is 958025.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6014 + ... + 6099.

It is an arithmetic number, because the mean of its divisors is an integer number (133254).

2⁵²⁰⁸⁵⁹ is an apocalyptic number.

520859 is a deficient number, since it is larger than the sum of its proper divisors (12157).

520859 is a wasteful number, since it uses less digits than its factorization.

520859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12156.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 520859 is about 721.7056186562. The cubic root of 520859 is about 80.4587703431.

The spelling of 520859 in words is "five hundred twenty thousand, eight hundred fifty-nine".