12439 has 4 divisors (see below), whose sum is σ = 14224. Its totient is φ = 10656.

The previous prime is 12437. The next prime is 12451. The reversal of 12439 is 93421.

12439 = 43² + 44² + ... + 48².

12439 is nontrivially palindromic in base 6.

12439 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93421 = 103 ⋅907.

It is a cyclic number.

It is not a de Polignac number, because 12439 - 2¹ = 12437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882 + ... + 895.

It is an arithmetic number, because the mean of its divisors is an integer number (3556).

12439 is a deficient number, since it is larger than the sum of its proper divisors (1785).

12439 is an equidigital number, since it uses as much as digits as its factorization.

12439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784.

The product of its digits is 216, while the sum is 19.

The square root of 12439 is about 111.5302649508. The cubic root of 12439 is about 23.1701310026.

The spelling of 12439 in words is "twelve thousand, four hundred thirty-nine".