520434 has 24 divisors (see below), whose sum is σ = 1167660. Its totient is φ = 167328.

The previous prime is 520433. The next prime is 520447. The reversal of 520434 is 434025.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 497025 + 23409 = 705^2 + 153^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (520433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24 + ... + 1020.

2⁵²⁰⁴³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583830).

520434 is an abundant number, since it is smaller than the sum of its proper divisors (647226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520434 is a wasteful number, since it uses less digits than its factorization.

520434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 520434 is about 721.4111171863. The cubic root of 520434 is about 80.4368806812.

Adding to 520434 its reverse (434025), we get a palindrome (954459).

The spelling of 520434 in words is "five hundred twenty thousand, four hundred thirty-four".