What is 135?

135 is a three-digit integer. It is an odd number that lies between 134 and 136. It is a composite number, which means it is not a prime number. The factors of 135 are 1, 3, 5, 9, 15, 27, 45, and 135. It is also a square-free number, which means it is not divisible by any perfect square other than 1. In Roman numerals, 135 is written as CXXXV.