142139807 has 2 divisors, whose sum is σ = 142139808. Its totient is φ = 142139806.

The previous prime is 142139801. The next prime is 142139819. The reversal of 142139807 is 708931241.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142139807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142139801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71069903 + 71069904.

It is an arithmetic number, because the mean of its divisors is an integer number (71069904).

Almost surely, 2^142139807 is an apocalyptic number.

142139807 is a deficient number, since it is larger than the sum of its proper divisors (1).

142139807 is an equidigital number, since it uses as much as digits as its factorization.

142139807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 142139807 is about 11922.2400160373. The cubic root of 142139807 is about 521.8815062093.

The spelling of 142139807 in words is "one hundred forty-two million, one hundred thirty-nine thousand, eight hundred seven".