561724 has 12 divisors (see below), whose sum is σ = 988344. Its totient is φ = 279344.

The previous prime is 561713. The next prime is 561733. The reversal of 561724 is 427165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047 + ... + 1489.

It is an arithmetic number, because the mean of its divisors is an integer number (82362).

2⁵⁶¹⁷²⁴ is an apocalyptic number.

It is an amenable number.

561724 is a deficient number, since it is larger than the sum of its proper divisors (426620).

561724 is a wasteful number, since it uses less digits than its factorization.

561724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 762 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 561724 is about 749.4824881210. The cubic root of 561724 is about 82.5102038190.

Adding to 561724 its reverse (427165), we get a palindrome (988889).

The spelling of 561724 in words is "five hundred sixty-one thousand, seven hundred twenty-four".