138039122 has 16 divisors (see below), whose sum is σ = 224282520. Its totient is φ = 63340032.

The previous prime is 138039067. The next prime is 138039127. The reversal of 138039122 is 221930831.

It can be written as a sum of positive squares in 4 ways, for example, as 138039001 + 121 = 11749^2 + 11^2 .

It is not an unprimeable number, because it can be changed into a prime (138039127) 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 7 ways as a sum of consecutive naturals, for example, 10847 + ... + 19842.

Almost surely, 2^138039122 is an apocalyptic number.

138039122 is a deficient number, since it is larger than the sum of its proper divisors (86243398).

138039122 is a wasteful number, since it uses less digits than its factorization.

138039122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30877.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 138039122 is about 11749.0051493733. The cubic root of 138039122 is about 516.8137536597.

Adding to 138039122 its reverse (221930831), we get a palindrome (359969953).

The spelling of 138039122 in words is "one hundred thirty-eight million, thirty-nine thousand, one hundred twenty-two".