12539 has 2 divisors, whose sum is σ = 12540.
Its totient is φ = 12538.
The previous prime is 12527. The next prime is 12541. The reversal of 12539 is 93521.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 12539 - 212 = 8443 is a prime.
Together with 12541, it forms a pair of twin primes.
It is a Chen prime.
It is a plaindrome in base 15.
It is a self number, because there is not a number n which added to its sum of digits gives 12539.
It is not a weakly prime, because it can be changed into another prime (12569) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6269 + 6270.
It is an arithmetic number, because the mean of its divisors is an integer number (6270).
212539 is an apocalyptic number.
12539 is a deficient number, since it is larger than the sum of its proper divisors (1).
12539 is an equidigital number, since it uses as much as digits as its factorization.
12539 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 270, while the sum is 20.
The square root of 12539 is about 111.9776763467.
The cubic root of 12539 is about 23.2320553717.
The spelling of 12539 in words is "twelve thousand, five hundred thirty-nine".