520646 has 8 divisors (see below), whose sum is σ = 892560. Its totient is φ = 223128.

The previous prime is 520633. The next prime is 520649. The reversal of 520646 is 646025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520649) 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, 18581 + ... + 18608.

It is an arithmetic number, because the mean of its divisors is an integer number (111570).

2⁵²⁰⁶⁴⁶ is an apocalyptic number.

520646 is a deficient number, since it is larger than the sum of its proper divisors (371914).

520646 is a wasteful number, since it uses less digits than its factorization.

520646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37198.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 520646 is about 721.5580364739. The cubic root of 520646 is about 80.4478012487.

The spelling of 520646 in words is "five hundred twenty thousand, six hundred forty-six".