138875125 has 16 divisors (see below), whose sum is σ = 183514032. Its totient is φ = 104563200.

The previous prime is 138875117. The next prime is 138875129. The reversal of 138875125 is 521578831.

It can be written as a sum of positive squares in 8 ways, for example, as 7474756 + 131400369 = 2734^2 + 11463^2 .

It is not a de Polignac number, because 138875125 - 2³ = 138875117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138875129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30552 + ... + 34801.

It is an arithmetic number, because the mean of its divisors is an integer number (11469627).

Almost surely, 2^138875125 is an apocalyptic number.

It is an amenable number.

138875125 is a deficient number, since it is larger than the sum of its proper divisors (44638907).

138875125 is an equidigital number, since it uses as much as digits as its factorization.

138875125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65385 (or 65375 counting only the distinct ones).

The product of its digits is 67200, while the sum is 40.

The square root of 138875125 is about 11784.5290529575. The cubic root of 138875125 is about 517.8549767193.

The spelling of 138875125 in words is "one hundred thirty-eight million, eight hundred seventy-five thousand, one hundred twenty-five".