142006139 has 6 divisors (see below), whose sum is σ = 154958916. Its totient is φ = 129060560.

The previous prime is 142006103. The next prime is 142006141. The reversal of 142006139 is 931600241.

It is not a de Polignac number, because 142006139 - 2⁸ = 142005883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142006159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37727 + ... + 41319.

It is an arithmetic number, because the mean of its divisors is an integer number (25826486).

Almost surely, 2^142006139 is an apocalyptic number.

142006139 is a deficient number, since it is larger than the sum of its proper divisors (12952777).

142006139 is an frugal number, since it uses more digits than its factorization.

142006139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7197 (or 3604 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 142006139 is about 11916.6328717470. The cubic root of 142006139 is about 521.7178627817.

The spelling of 142006139 in words is "one hundred forty-two million, six thousand, one hundred thirty-nine".