531724 has 12 divisors (see below), whose sum is σ = 935704. Its totient is φ = 264384.

The previous prime is 531701. The next prime is 531731. The reversal of 531724 is 427135.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 531695 and 531704.

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 3 ways as a sum of consecutive naturals, for example, 1012 + ... + 1444.

2⁵³¹⁷²⁴ is an apocalyptic number.

It is an amenable number.

531724 is a deficient number, since it is larger than the sum of its proper divisors (403980).

531724 is a wasteful number, since it uses less digits than its factorization.

531724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 742 counting only the distinct ones).

The product of its digits is 840, while the sum is 22.

The square root of 531724 is about 729.1940756753. The cubic root of 531724 is about 81.0143753382.

Adding to 531724 its reverse (427135), we get a palindrome (958859).

The spelling of 531724 in words is "five hundred thirty-one thousand, seven hundred twenty-four".