138139125 has 32 divisors (see below), whose sum is σ = 232502400. Its totient is φ = 72828800.

The previous prime is 138139123. The next prime is 138139129. The reversal of 138139125 is 521931831.

It is not a de Polignac number, because 138139125 - 2¹ = 138139123 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138139121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31306 + ... + 35444.

It is an arithmetic number, because the mean of its divisors is an integer number (7265700).

Almost surely, 2^138139125 is an apocalyptic number.

138139125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138139125 is a deficient number, since it is larger than the sum of its proper divisors (94363275).

138139125 is an equidigital number, since it uses as much as digits as its factorization.

138139125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246 (or 4236 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 138139125 is about 11753.2601860080. The cubic root of 138139125 is about 516.9385261383.

The spelling of 138139125 in words is "one hundred thirty-eight million, one hundred thirty-nine thousand, one hundred twenty-five".