520015 has 4 divisors (see below), whose sum is σ = 624024. Its totient is φ = 416008.

The previous prime is 519997. The next prime is 520019. The reversal of 520015 is 510025.

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 520015 - 2¹¹ = 517967 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 519977 and 520004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520019) 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, 51997 + ... + 52006.

It is an arithmetic number, because the mean of its divisors is an integer number (156006).

2⁵²⁰⁰¹⁵ is an apocalyptic number.

520015 is a deficient number, since it is larger than the sum of its proper divisors (104009).

520015 is a wasteful number, since it uses less digits than its factorization.

520015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104008.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 520015 is about 721.1206556465. The cubic root of 520015 is about 80.4152883808.

The spelling of 520015 in words is "five hundred twenty thousand, fifteen".