139057242 has 8 divisors (see below), whose sum is σ = 278114496. Its totient is φ = 46352412.

The previous prime is 139057187. The next prime is 139057267. The reversal of 139057242 is 242750931.

It is a sphenic number, since it is the product of 3 distinct primes.

139057242 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11588098 + ... + 11588109.

It is an arithmetic number, because the mean of its divisors is an integer number (34764312).

Almost surely, 2^139057242 is an apocalyptic number.

139057242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139057242 is a wasteful number, since it uses less digits than its factorization.

139057242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23176212.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 139057242 is about 11792.2534742092. The cubic root of 139057242 is about 518.0812447414.

The spelling of 139057242 in words is "one hundred thirty-nine million, fifty-seven thousand, two hundred forty-two".