522540 has 36 divisors (see below), whose sum is σ = 1585584. Its totient is φ = 139296.

The previous prime is 522523. The next prime is 522541. The reversal of 522540 is 45225.

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 not an unprimeable number, because it can be changed into a prime (522541) 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, 1272 + ... + 1631.

It is an arithmetic number, because the mean of its divisors is an integer number (44044).

2⁵²²⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

522540 is an abundant number, since it is smaller than the sum of its proper divisors (1063044).

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

522540 is a wasteful number, since it uses less digits than its factorization.

522540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918 (or 2913 counting only the distinct ones).

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

The square root of 522540 is about 722.8692827891. The cubic root of 522540 is about 80.5452338913.

Adding to 522540 its reverse (45225), we get a palindrome (567765).

The spelling of 522540 in words is "five hundred twenty-two thousand, five hundred forty".