4239 has 8 divisors (see below), whose sum is σ = 6320. Its totient is φ = 2808.

The previous prime is 4231. The next prime is 4241. The reversal of 4239 is 9324.

It is not a de Polignac number, because 4239 - 2³ = 4231 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52 + ... + 105.

It is an arithmetic number, because the mean of its divisors is an integer number (790).

2⁴²³⁹ is an apocalyptic number.

4239 is a deficient number, since it is larger than the sum of its proper divisors (2081).

4239 is a wasteful number, since it uses less digits than its factorization.

4239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 160 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 4239 is about 65.1076032426. The cubic root of 4239 is about 16.1840721363.

It can be divided in two parts, 42 and 39, that added together give a 4-th power (81 = 3⁴).

The spelling of 4239 in words is "four thousand, two hundred thirty-nine".