561324 has 24 divisors (see below), whose sum is σ = 1355760. Its totient is φ = 180544.

The previous prime is 561313. The next prime is 561343. The reversal of 561324 is 423165.

It is a happy number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 561324.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459 + ... + 1154.

It is an arithmetic number, because the mean of its divisors is an integer number (56490).

2⁵⁶¹³²⁴ is an apocalyptic number.

It is an amenable number.

561324 is an abundant number, since it is smaller than the sum of its proper divisors (794436).

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

561324 is a wasteful number, since it uses less digits than its factorization.

561324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649 (or 1647 counting only the distinct ones).

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

The square root of 561324 is about 749.2155898004. The cubic root of 561324 is about 82.4906141756.

Adding to 561324 its reverse (423165), we get a palindrome (984489).

The spelling of 561324 in words is "five hundred sixty-one thousand, three hundred twenty-four".