12539143 has 4 divisors (see below), whose sum is σ = 12559288. Its totient is φ = 12519000.

The previous prime is 12539113. The next prime is 12539161. The reversal of 12539143 is 34193521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12539143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12539113) 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, 9108 + ... + 10393.

It is an arithmetic number, because the mean of its divisors is an integer number (3139822).

Almost surely, 2^12539143 is an apocalyptic number.

12539143 is a deficient number, since it is larger than the sum of its proper divisors (20145).

12539143 is an equidigital number, since it uses as much as digits as its factorization.

12539143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20144.

The product of its digits is 3240, while the sum is 28.

The square root of 12539143 is about 3541.0652352082. The cubic root of 12539143 is about 232.3214368740.

The spelling of 12539143 in words is "twelve million, five hundred thirty-nine thousand, one hundred forty-three".