520524 has 36 divisors (see below), whose sum is σ = 1386840. Its totient is φ = 164160.

The previous prime is 520451. The next prime is 520529. The reversal of 520524 is 425025.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 520497 and 520506.

It is not an unprimeable number, because it can be changed into a prime (520529) 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 11 ways as a sum of consecutive naturals, for example, 304 + ... + 1064.

2⁵²⁰⁵²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693420).

520524 is an abundant number, since it is smaller than the sum of its proper divisors (866316).

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

520524 is a wasteful number, since it uses less digits than its factorization.

520524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 785 counting only the distinct ones).

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

The square root of 520524 is about 721.4734922365. The cubic root of 520524 is about 80.4415171334.

Adding to 520524 its reverse (425025), we get a palindrome (945549).

The spelling of 520524 in words is "five hundred twenty thousand, five hundred twenty-four".