520839 has 12 divisors (see below), whose sum is σ = 820872. Its totient is φ = 315600.

The previous prime is 520837. The next prime is 520841. The reversal of 520839 is 938025.

It is an interprime number because it is at equal distance from previous prime (520837) and next prime (520841).

It is not a de Polignac number, because 520839 - 2¹ = 520837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2532 + ... + 2729.

It is an arithmetic number, because the mean of its divisors is an integer number (68406).

2⁵²⁰⁸³⁹ is an apocalyptic number.

520839 is a deficient number, since it is larger than the sum of its proper divisors (300033).

520839 is a wasteful number, since it uses less digits than its factorization.

520839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278 (or 5275 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 520839 is about 721.6917624582. The cubic root of 520839 is about 80.4577405084.

The spelling of 520839 in words is "five hundred twenty thousand, eight hundred thirty-nine".