138158 has 8 divisors (see below), whose sum is σ = 212952. Its totient is φ = 67176.

The previous prime is 138157. The next prime is 138163. The reversal of 138158 is 851831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860 + ... + 1007.

It is an arithmetic number, because the mean of its divisors is an integer number (26619).

2¹³⁸¹⁵⁸ is an apocalyptic number.

138158 is a deficient number, since it is larger than the sum of its proper divisors (74794).

138158 is a wasteful number, since it uses less digits than its factorization.

138158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906.

The product of its digits is 960, while the sum is 26.

The square root of 138158 is about 371.6961124360. The cubic root of 138158 is about 51.6962069481.

Adding to 138158 its reverse (851831), we get a palindrome (989989).

The spelling of 138158 in words is "one hundred thirty-eight thousand, one hundred fifty-eight".