12242139 has 16 divisors (see below), whose sum is σ = 20090112. Its totient is φ = 6457248.

The previous prime is 12242123. The next prime is 12242161. The reversal of 12242139 is 93124221.

12242139 = T₂₇₂ + T₂₇₃ + ... + T₄₅₃.

It is not a de Polignac number, because 12242139 - 2⁴ = 12242123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12242189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22149 + ... + 22694.

It is an arithmetic number, because the mean of its divisors is an integer number (1255632).

Almost surely, 2^12242139 is an apocalyptic number.

12242139 is a deficient number, since it is larger than the sum of its proper divisors (7847973).

12242139 is a wasteful number, since it uses less digits than its factorization.

12242139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44866.

The product of its digits is 864, while the sum is 24.

The square root of 12242139 is about 3498.8768197809. The cubic root of 12242139 is about 230.4724943377.

The spelling of 12242139 in words is "twelve million, two hundred forty-two thousand, one hundred thirty-nine".