135918 has 20 divisors (see below), whose sum is σ = 304920. Its totient is φ = 45252.

The previous prime is 135913. The next prime is 135929. The reversal of 135918 is 819531.

135918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 135891 and 135900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135911) 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, 258 + ... + 581.

It is an arithmetic number, because the mean of its divisors is an integer number (15246).

2¹³⁵⁹¹⁸ is an apocalyptic number.

135918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

135918 is an abundant number, since it is smaller than the sum of its proper divisors (169002).

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

135918 is an equidigital number, since it uses as much as digits as its factorization.

135918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853 (or 844 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 135918 is about 368.6705846688. The cubic root of 135918 is about 51.4152941916.

The spelling of 135918 in words is "one hundred thirty-five thousand, nine hundred eighteen".