520355 has 8 divisors (see below), whose sum is σ = 681264. Its totient is φ = 378400.

The previous prime is 520349. The next prime is 520357. The reversal of 520355 is 553025.

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

It is not a de Polignac number, because 520355 - 2⁴ = 520339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4676 + ... + 4785.

It is an arithmetic number, because the mean of its divisors is an integer number (85158).

2⁵²⁰³⁵⁵ is an apocalyptic number.

520355 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

520355 is a deficient number, since it is larger than the sum of its proper divisors (160909).

520355 is a wasteful number, since it uses less digits than its factorization.

520355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9477.

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 520355 is about 721.3563613083. The cubic root of 520355 is about 80.4328104660.

The spelling of 520355 in words is "five hundred twenty thousand, three hundred fifty-five".