522420 has 24 divisors (see below), whose sum is σ = 1462944. Its totient is φ = 139296.

The previous prime is 522413. The next prime is 522439. The reversal of 522420 is 24225.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 522420.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 522420.

It is an unprimeable number.

522420 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4294 + ... + 4413.

It is an arithmetic number, because the mean of its divisors is an integer number (60956).

2⁵²²⁴²⁰ is an apocalyptic number.

It is an amenable number.

522420 is an abundant number, since it is smaller than the sum of its proper divisors (940524).

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

522420 is a wasteful number, since it uses less digits than its factorization.

522420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8719 (or 8717 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 522420 is about 722.7862754646. The cubic root of 522420 is about 80.5390677490.

Adding to 522420 its reverse (24225), we get a palindrome (546645).

The spelling of 522420 in words is "five hundred twenty-two thousand, four hundred twenty".