117138 has 16 divisors (see below), whose sum is σ = 267840. Its totient is φ = 33456.

The previous prime is 117133. The next prime is 117163. The reversal of 117138 is 831711.

117138 = T₆₂ + T₆₃ + ... + T₉₇.

It is a super-2 number, since 2×117138² = 27442622088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (117133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1353 + ... + 1436.

It is an arithmetic number, because the mean of its divisors is an integer number (16740).

2¹¹⁷¹³⁸ is an apocalyptic number.

117138 is an abundant number, since it is smaller than the sum of its proper divisors (150702).

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

117138 is a wasteful number, since it uses less digits than its factorization.

117138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801.

The product of its digits is 168, while the sum is 21.

The square root of 117138 is about 342.2542914267. The cubic root of 117138 is about 48.9289543772.

Adding to 117138 its reverse (831711), we get a palindrome (948849).

The spelling of 117138 in words is "one hundred seventeen thousand, one hundred thirty-eight".