520566 has 16 divisors (see below), whose sum is σ = 1061424. Its totient is φ = 170144.

The previous prime is 520549. The next prime is 520567. The reversal of 520566 is 665025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520567) by changing a digit.

520566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 501 + ... + 1136.

It is an arithmetic number, because the mean of its divisors is an integer number (66339).

2⁵²⁰⁵⁶⁶ is an apocalyptic number.

520566 is an abundant number, since it is smaller than the sum of its proper divisors (540858).

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

520566 is a wasteful number, since it uses less digits than its factorization.

520566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 520566 is about 721.5025987479. The cubic root of 520566 is about 80.4436806281.

The spelling of 520566 in words is "five hundred twenty thousand, five hundred sixty-six".