74239 has 8 divisors (see below), whose sum is σ = 85968. Its totient is φ = 63360.

The previous prime is 74231. The next prime is 74257. The reversal of 74239 is 93247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74239 - 2³ = 74231 is a prime.

It is a super-2 number, since 2×74239² = 11022858242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74231) 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 7 ways as a sum of consecutive naturals, for example, 12 + ... + 385.

It is an arithmetic number, because the mean of its divisors is an integer number (10746).

2⁷⁴²³⁹ is an apocalyptic number.

74239 is a deficient number, since it is larger than the sum of its proper divisors (11729).

74239 is a wasteful number, since it uses less digits than its factorization.

74239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its digits is 1512, while the sum is 25.

The square root of 74239 is about 272.4683467855. The cubic root of 74239 is about 42.0285142726.

Subtracting from 74239 its product of digits (1512), we obtain a palindrome (72727).

It can be divided in two parts, 74 and 239, that added together give a palindrome (313).

The spelling of 74239 in words is "seventy-four thousand, two hundred thirty-nine".