522724 has 6 divisors (see below), whose sum is σ = 914774. Its totient is φ = 261360.

The previous prime is 522719. The next prime is 522737. The reversal of 522724 is 427225.

522724 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 465124 + 57600 = 682^2 + 240^2 .

It is a junction number, because it is equal to n+sod(n) for n = 522695 and 522704.

It is an unprimeable number.

522724 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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65337 + ... + 65344.

2⁵²²⁷²⁴ is an apocalyptic number.

It is an amenable number.

522724 is a deficient number, since it is larger than the sum of its proper divisors (392050).

522724 is a wasteful number, since it uses less digits than its factorization.

522724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130685 (or 130683 counting only the distinct ones).

The product of its digits is 1120, while the sum is 22.

The square root of 522724 is about 722.9965421771. The cubic root of 522724 is about 80.5546868097.

Adding to 522724 its reverse (427225), we get a palindrome (949949).

The spelling of 522724 in words is "five hundred twenty-two thousand, seven hundred twenty-four".