139975242 has 32 divisors (see below), whose sum is σ = 321477120. Its totient is φ = 40183920.

The previous prime is 139975211. The next prime is 139975291. The reversal of 139975242 is 242579931.

139975242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 139975194 and 139975203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54558 + ... + 57065.

It is an arithmetic number, because the mean of its divisors is an integer number (10046160).

Almost surely, 2^139975242 is an apocalyptic number.

139975242 is an abundant number, since it is smaller than the sum of its proper divisors (181501878).

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

139975242 is a wasteful number, since it uses less digits than its factorization.

139975242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111658.

The product of its digits is 136080, while the sum is 42.

The square root of 139975242 is about 11831.1133034892. The cubic root of 139975242 is about 519.2187998642.

The spelling of 139975242 in words is "one hundred thirty-nine million, nine hundred seventy-five thousand, two hundred forty-two".