520580 has 12 divisors (see below), whose sum is σ = 1093260. Its totient is φ = 208224.

The previous prime is 520571. The next prime is 520589. The reversal of 520580 is 85025.

It is an interprime number because it is at equal distance from previous prime (520571) and next prime (520589).

It can be written as a sum of positive squares in 2 ways, for example, as 87616 + 432964 = 296^2 + 658^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 26029 = 520580 / (5 + 2 + 0 + 5 + 8 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520589) by changing a digit.

520580 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12995 + ... + 13034.

It is an arithmetic number, because the mean of its divisors is an integer number (91105).

2⁵²⁰⁵⁸⁰ is an apocalyptic number.

It is an amenable number.

520580 is an abundant number, since it is smaller than the sum of its proper divisors (572680).

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

520580 is a wasteful number, since it uses less digits than its factorization.

520580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26038 (or 26036 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 520580 is about 721.5123006574. The cubic root of 520580 is about 80.4444017672. Note that the first 4 decimals are identical.

The spelling of 520580 in words is "five hundred twenty thousand, five hundred eighty".