118138 has 4 divisors (see below), whose sum is σ = 177210. Its totient is φ = 59068.

The previous prime is 118127. The next prime is 118147. The reversal of 118138 is 831811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 88209 + 29929 = 297^2 + 173^2 .

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 as a sum of consecutive naturals, namely, 29533 + ... + 29536.

2¹¹⁸¹³⁸ is an apocalyptic number.

118138 is a deficient number, since it is larger than the sum of its proper divisors (59072).

118138 is an equidigital number, since it uses as much as digits as its factorization.

118138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59071.

The product of its digits is 192, while the sum is 22.

The square root of 118138 is about 343.7120888185. The cubic root of 118138 is about 49.0677945386.

Adding to 118138 its reverse (831811), we get a palindrome (949949).

It can be divided in two parts, 118 and 138, that added together give a 8-th power (256 = 2⁸).

The spelling of 118138 in words is "one hundred eighteen thousand, one hundred thirty-eight".