520245 has 24 divisors (see below), whose sum is σ = 984672. Its totient is φ = 252000.

The previous prime is 520241. The next prime is 520279. The reversal of 520245 is 542025.

It is not a de Polignac number, because 520245 - 2² = 520241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520241) 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 23 ways as a sum of consecutive naturals, for example, 31 + ... + 1020.

It is an arithmetic number, because the mean of its divisors is an integer number (41028).

2⁵²⁰²⁴⁵ is an apocalyptic number.

520245 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

520245 is a deficient number, since it is larger than the sum of its proper divisors (464427).

520245 is a wasteful number, since it uses less digits than its factorization.

520245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 520245 is about 721.2801120231. The cubic root of 520245 is about 80.4271423916.

The spelling of 520245 in words is "five hundred twenty thousand, two hundred forty-five".