139742185 has 16 divisors (see below), whose sum is σ = 186390720. Its totient is φ = 99711040.

The previous prime is 139742179. The next prime is 139742189. The reversal of 139742185 is 581247931.

It is not a de Polignac number, because 139742185 - 2⁹ = 139741673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139742189) 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 in 15 ways as a sum of consecutive naturals, for example, 21055 + ... + 26884.

It is an arithmetic number, because the mean of its divisors is an integer number (11649420).

Almost surely, 2^139742185 is an apocalyptic number.

It is an amenable number.

139742185 is a deficient number, since it is larger than the sum of its proper divisors (46648535).

139742185 is a wasteful number, since it uses less digits than its factorization.

139742185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48008.

The product of its digits is 60480, while the sum is 40.

The square root of 139742185 is about 11821.2598736345. The cubic root of 139742185 is about 518.9304755506.

The spelling of 139742185 in words is "one hundred thirty-nine million, seven hundred forty-two thousand, one hundred eighty-five".