12139 has 4 divisors (see below), whose sum is σ = 12400. Its totient is φ = 11880.

The previous prime is 12119. The next prime is 12143. The reversal of 12139 is 93121.

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

It is a cyclic number.

It is not a de Polignac number, because 12139 - 2⁵ = 12107 is a prime.

It is a Duffinian number.

12139 is a lucky number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (12109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39 + ... + 160.

It is an arithmetic number, because the mean of its divisors is an integer number (3100).

2¹²¹³⁹ is an apocalyptic number.

12139 is a deficient number, since it is larger than the sum of its proper divisors (261).

12139 is an equidigital number, since it uses as much as digits as its factorization.

12139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its digits is 54, while the sum is 16.

The square root of 12139 is about 110.1771301133. The cubic root of 12139 is about 22.9823430962.

It can be divided in two parts, 12 and 139, that added together give a palindrome (151).

The spelling of 12139 in words is "twelve thousand, one hundred thirty-nine".