138875 has 16 divisors (see below), whose sum is σ = 190944. Its totient is φ = 100000.

The previous prime is 138869. The next prime is 138883. The reversal of 138875 is 578831.

It is a de Polignac number, because none of the positive numbers 2^k-138875 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1325 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (11934).

138875 is a Friedman number, since it can be written as (81*7^3-8)*5, using all its digits and the basic arithmetic operations.

2¹³⁸⁸⁷⁵ is an apocalyptic number.

138875 is a deficient number, since it is larger than the sum of its proper divisors (52069).

138875 is a wasteful number, since it uses less digits than its factorization.

138875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 117 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 138875 is about 372.6593618843. The cubic root of 138875 is about 51.7854821347.

It can be divided in two parts, 13 and 8875, that added together give a palindrome (8888).

The spelling of 138875 in words is "one hundred thirty-eight thousand, eight hundred seventy-five".