522404 has 12 divisors (see below), whose sum is σ = 929628. Its totient is φ = 256800.

The previous prime is 522391. The next prime is 522409. The reversal of 522404 is 404225.

It can be written as a sum of positive squares in 2 ways, for example, as 252004 + 270400 = 502^2 + 520^2 .

It is a hoax number, since the sum of its digits (17) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (522409) by changing a digit.

522404 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 827 + ... + 1314.

It is an arithmetic number, because the mean of its divisors is an integer number (77469).

2⁵²²⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

522404 is a deficient number, since it is larger than the sum of its proper divisors (407224).

522404 is a wasteful number, since it uses less digits than its factorization.

522404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206 (or 2204 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 522404 is about 722.7752071011. The cubic root of 522404 is about 80.5382455254.

Adding to 522404 its reverse (404225), we get a palindrome (926629).

The spelling of 522404 in words is "five hundred twenty-two thousand, four hundred four".