520873 has 4 divisors (see below), whose sum is σ = 524160. Its totient is φ = 517588.

The previous prime is 520867. The next prime is 520889. The reversal of 520873 is 378025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520873 - 2⁵ = 520841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520813) 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, 1393 + ... + 1726.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

2⁵²⁰⁸⁷³ is an apocalyptic number.

It is an amenable number.

520873 is a deficient number, since it is larger than the sum of its proper divisors (3287).

520873 is a wasteful number, since it uses less digits than its factorization.

520873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 520873 is about 721.7153178366. The cubic root of 520873 is about 80.4594912117.

Adding to 520873 its reverse (378025), we get a palindrome (898898).

The spelling of 520873 in words is "five hundred twenty thousand, eight hundred seventy-three".