12442139 has 2 divisors, whose sum is σ = 12442140. Its totient is φ = 12442138.

The previous prime is 12442117. The next prime is 12442151. The reversal of 12442139 is 93124421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12442139 - 2⁸ = 12441883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12442159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221069 + 6221070.

It is an arithmetic number, because the mean of its divisors is an integer number (6221070).

Almost surely, 2^12442139 is an apocalyptic number.

12442139 is a deficient number, since it is larger than the sum of its proper divisors (1).

12442139 is an equidigital number, since it uses as much as digits as its factorization.

12442139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 12442139 is about 3527.3416335819. The cubic root of 12442139 is about 231.7207984426.

The spelling of 12442139 in words is "twelve million, four hundred forty-two thousand, one hundred thirty-nine".