142000139 has 2 divisors, whose sum is σ = 142000140. Its totient is φ = 142000138.

The previous prime is 142000127. The next prime is 142000169. The reversal of 142000139 is 931000241.

It is a weak prime.

It is an emirp because it is prime and its reverse (931000241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142000139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142000139.

It is not a weakly prime, because it can be changed into another prime (142000109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71000069 + 71000070.

It is an arithmetic number, because the mean of its divisors is an integer number (71000070).

Almost surely, 2^142000139 is an apocalyptic number.

142000139 is a deficient number, since it is larger than the sum of its proper divisors (1).

142000139 is an equidigital number, since it uses as much as digits as its factorization.

142000139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 142000139 is about 11916.3811201220. The cubic root of 142000139 is about 521.7105148570.

The spelling of 142000139 in words is "one hundred forty-two million, one hundred thirty-nine", and thus it is an aban number.