724239 has 6 divisors (see below), whose sum is σ = 1046136. Its totient is φ = 482820.

The previous prime is 724219. The next prime is 724259. The reversal of 724239 is 932427.

724239 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (724219) and next prime (724259).

It is not a de Polignac number, because 724239 - 2⁷ = 724111 is a prime.

724239 is strictly pandigital in base 7.

724239 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40227 + ... + 40244.

It is an arithmetic number, because the mean of its divisors is an integer number (174356).

2⁷²⁴²³⁹ is an apocalyptic number.

724239 is a deficient number, since it is larger than the sum of its proper divisors (321897).

724239 is a wasteful number, since it uses less digits than its factorization.

724239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80477 (or 80474 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 724239 is about 851.0223263816. The cubic root of 724239 is about 89.8036459979.

The spelling of 724239 in words is "seven hundred twenty-four thousand, two hundred thirty-nine".