522740 has 24 divisors (see below), whose sum is σ = 1118880. Its totient is φ = 205088.

The previous prime is 522737. The next prime is 522749. The reversal of 522740 is 47225.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (46620).

2⁵²²⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

522740 is an abundant number, since it is smaller than the sum of its proper divisors (596140).

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

522740 is a wasteful number, since it uses less digits than its factorization.

522740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 522740 is about 723.0076071522. The cubic root of 522740 is about 80.5555086977. Note that the first 4 decimals are identical.

Adding to 522740 its reverse (47225), we get a palindrome (569965).

The spelling of 522740 in words is "five hundred twenty-two thousand, seven hundred forty".