138186 has 20 divisors (see below), whose sum is σ = 310002. Its totient is φ = 46008.

The previous prime is 138181. The next prime is 138191. The reversal of 138186 is 681831.

138186 is nontrivially palindromic in base 12.

138186 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138181) and next prime (138191).

It can be written as a sum of positive squares in only one way, i.e., 136161 + 2025 = 369^2 + 45^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138186.

It is not an unprimeable number, because it can be changed into a prime (138181) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 265 + ... + 588.

2¹³⁸¹⁸⁶ is an apocalyptic number.

138186 is an abundant number, since it is smaller than the sum of its proper divisors (171816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138186 is an equidigital number, since it uses as much as digits as its factorization.

138186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 858 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 138186 is about 371.7337757051. The cubic root of 138186 is about 51.6996990755.

It can be divided in two parts, 13818 and 6, that added together give a cube (13824 = 24³).

The spelling of 138186 in words is "one hundred thirty-eight thousand, one hundred eighty-six".