522660 has 48 divisors (see below), whose sum is σ = 1516032. Its totient is φ = 134400.

The previous prime is 522659. The next prime is 522661. The reversal of 522660 is 66225.

It is an interprime number because it is at equal distance from previous prime (522659) and next prime (522661).

It is not an unprimeable number, because it can be changed into a prime (522661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1720 + ... + 2000.

It is an arithmetic number, because the mean of its divisors is an integer number (31584).

2⁵²²⁶⁶⁰ 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 522660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758016).

522660 is an abundant number, since it is smaller than the sum of its proper divisors (993372).

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

522660 is a wasteful number, since it uses less digits than its factorization.

522660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 522660 is about 722.9522805829. The cubic root of 522660 is about 80.5513990897.

Adding to 522660 its reverse (66225), we get a palindrome (588885).

The spelling of 522660 in words is "five hundred twenty-two thousand, six hundred sixty".