520437 has 8 divisors (see below), whose sum is σ = 697504. Its totient is φ = 345168.

The previous prime is 520433. The next prime is 520447. The reversal of 520437 is 734025.

It is a happy number.

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

It is not a de Polignac number, because 520437 - 2² = 520433 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520433) 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 7 ways as a sum of consecutive naturals, for example, 543 + ... + 1155.

It is an arithmetic number, because the mean of its divisors is an integer number (87188).

2⁵²⁰⁴³⁷ is an apocalyptic number.

It is an amenable number.

520437 is a deficient number, since it is larger than the sum of its proper divisors (177067).

520437 is a wasteful number, since it uses less digits than its factorization.

520437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 520437 is about 721.4131964415. The cubic root of 520437 is about 80.4370352383.

The spelling of 520437 in words is "five hundred twenty thousand, four hundred thirty-seven".