139244142 has 32 divisors (see below), whose sum is σ = 283630752. Its totient is φ = 45563904.

The previous prime is 139244107. The next prime is 139244143. The reversal of 139244142 is 241442931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139244143) 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, 111948 + ... + 113184.

It is an arithmetic number, because the mean of its divisors is an integer number (8863461).

Almost surely, 2^139244142 is an apocalyptic number.

139244142 is an abundant number, since it is smaller than the sum of its proper divisors (144386610).

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

139244142 is a wasteful number, since it uses less digits than its factorization.

139244142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its digits is 6912, while the sum is 30.

The square root of 139244142 is about 11800.1755071694. The cubic root of 139244142 is about 518.3132500039.

The spelling of 139244142 in words is "one hundred thirty-nine million, two hundred forty-four thousand, one hundred forty-two".