12142139 has 2 divisors, whose sum is σ = 12142140. Its totient is φ = 12142138.

The previous prime is 12142129. The next prime is 12142147. The reversal of 12142139 is 93124121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12142139 is a prime.

It is not a weakly prime, because it can be changed into another prime (12142129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6071069 + 6071070.

It is an arithmetic number, because the mean of its divisors is an integer number (6071070).

Almost surely, 2^12142139 is an apocalyptic number.

12142139 is a deficient number, since it is larger than the sum of its proper divisors (1).

12142139 is an equidigital number, since it uses as much as digits as its factorization.

12142139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 12142139 is about 3484.5572172085. The cubic root of 12142139 is about 229.8432391166.

The spelling of 12142139 in words is "twelve million, one hundred forty-two thousand, one hundred thirty-nine".