138237242 has 16 divisors (see below), whose sum is σ = 243607392. Its totient is φ = 58001520.

The previous prime is 138237241. The next prime is 138237257. The reversal of 138237242 is 242732831.

138237242 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 = 138237199 and 138237208.

It is not an unprimeable number, because it can be changed into a prime (138237241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241388 + ... + 241959.

It is an arithmetic number, because the mean of its divisors is an integer number (15225462).

Almost surely, 2^138237242 is an apocalyptic number.

138237242 is a deficient number, since it is larger than the sum of its proper divisors (105370150).

138237242 is a wasteful number, since it uses less digits than its factorization.

138237242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483373.

The product of its digits is 16128, while the sum is 32.

The square root of 138237242 is about 11757.4334784425. The cubic root of 138237242 is about 517.0608869674.

The spelling of 138237242 in words is "one hundred thirty-eight million, two hundred thirty-seven thousand, two hundred forty-two".