138181875 has 40 divisors (see below), whose sum is σ = 247983120. Its totient is φ = 68016000.

The previous prime is 138181873. The next prime is 138181891. The reversal of 138181875 is 578181831.

It is not a de Polignac number, because 138181875 - 2¹ = 138181873 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138181873) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21541 + ... + 27209.

It is an arithmetic number, because the mean of its divisors is an integer number (6199578).

Almost surely, 2^138181875 is an apocalyptic number.

138181875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138181875 is a deficient number, since it is larger than the sum of its proper divisors (109801245).

138181875 is an equidigital number, since it uses as much as digits as its factorization.

138181875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5705 (or 5690 counting only the distinct ones).

The product of its digits is 53760, while the sum is 42.

The square root of 138181875 is about 11755.0786896558. The cubic root of 138181875 is about 516.9918463996.

The spelling of 138181875 in words is "one hundred thirty-eight million, one hundred eighty-one thousand, eight hundred seventy-five".