520407 has 12 divisors (see below), whose sum is σ = 766584. Its totient is φ = 340080.

The previous prime is 520393. The next prime is 520409. The reversal of 520407 is 704025.

It is a happy number.

It is not a de Polignac number, because 520407 - 2⁷ = 520279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520409) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 69 + ... + 1022.

It is an arithmetic number, because the mean of its divisors is an integer number (63882).

2⁵²⁰⁴⁰⁷ is an apocalyptic number.

520407 is a deficient number, since it is larger than the sum of its proper divisors (246177).

520407 is a wasteful number, since it uses less digits than its factorization.

520407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150 (or 1147 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 520407 is about 721.3924036196. The cubic root of 520407 is about 80.4354896414.

The spelling of 520407 in words is "five hundred twenty thousand, four hundred seven".