139242 has 16 divisors (see below), whose sum is σ = 290880. Its totient is φ = 44352.

The previous prime is 139241. The next prime is 139267. The reversal of 139242 is 242931.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139242.

It is not an unprimeable number, because it can be changed into a prime (139241) 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 in 7 ways as a sum of consecutive naturals, for example, 367 + ... + 642.

It is an arithmetic number, because the mean of its divisors is an integer number (18180).

2¹³⁹²⁴² is an apocalyptic number.

139242 is an abundant number, since it is smaller than the sum of its proper divisors (151638).

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

139242 is a wasteful number, since it uses less digits than its factorization.

139242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037.

The product of its digits is 432, while the sum is 21.

The square root of 139242 is about 373.1514437866. The cubic root of 139242 is about 51.8310592244.

The spelling of 139242 in words is "one hundred thirty-nine thousand, two hundred forty-two".