724537 has 4 divisors (see below), whose sum is σ = 790416. Its totient is φ = 658660.

The previous prime is 724531. The next prime is 724547. The reversal of 724537 is 735427.

724537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is the 348-th star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 724537 - 2¹¹ = 722489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (724531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32923 + ... + 32944.

It is an arithmetic number, because the mean of its divisors is an integer number (197604).

2⁷²⁴⁵³⁷ is an apocalyptic number.

It is an amenable number.

724537 is a deficient number, since it is larger than the sum of its proper divisors (65879).

724537 is a wasteful number, since it uses less digits than its factorization.

724537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65878.

The product of its digits is 5880, while the sum is 28.

The square root of 724537 is about 851.1973919133. The cubic root of 724537 is about 89.8159613693.

The spelling of 724537 in words is "seven hundred twenty-four thousand, five hundred thirty-seven".