520655 has 8 divisors (see below), whose sum is σ = 631584. Its totient is φ = 412000.

The previous prime is 520649. The next prime is 520679. The reversal of 520655 is 556025.

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

It is a de Polignac number, because none of the positive numbers 2^k-520655 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 520655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11 + ... + 1020.

It is an arithmetic number, because the mean of its divisors is an integer number (78948).

2⁵²⁰⁶⁵⁵ is an apocalyptic number.

520655 is a deficient number, since it is larger than the sum of its proper divisors (110929).

520655 is a wasteful number, since it uses less digits than its factorization.

520655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 520655 is about 721.5642729515. The cubic root of 520655 is about 80.4482647921.

The spelling of 520655 in words is "five hundred twenty thousand, six hundred fifty-five".