724539 has 4 divisors (see below), whose sum is σ = 966056. Its totient is φ = 483024.

The previous prime is 724531. The next prime is 724547. The reversal of 724539 is 935427.

724539 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (724531) and next prime (724547).

It is not a de Polignac number, because 724539 - 2³ = 724531 is a prime.

It is a D-number.

It is a Duffinian number.

724539 is strictly pandigital in base 7.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120754 + ... + 120759.

It is an arithmetic number, because the mean of its divisors is an integer number (241514).

2⁷²⁴⁵³⁹ is an apocalyptic number.

724539 is a deficient number, since it is larger than the sum of its proper divisors (241517).

724539 is a wasteful number, since it uses less digits than its factorization.

724539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241516.

The product of its digits is 7560, while the sum is 30.

The square root of 724539 is about 851.1985667281. The cubic root of 724539 is about 89.8160440114.

The spelling of 724539 in words is "seven hundred twenty-four thousand, five hundred thirty-nine".