135588 has 12 divisors (see below), whose sum is σ = 316400. Its totient is φ = 45192.

The previous prime is 135581. The next prime is 135589. The reversal of 135588 is 885531.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (135581) by changing a digit.

135588 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5638 + ... + 5661.

2¹³⁵⁵⁸⁸ is an apocalyptic number.

It is an amenable number.

135588 is an abundant number, since it is smaller than the sum of its proper divisors (180812).

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

135588 is a wasteful number, since it uses less digits than its factorization.

135588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11306 (or 11304 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 135588 is about 368.2227586665. Note that the first 3 decimals coincide. The cubic root of 135588 is about 51.3736494811.

The spelling of 135588 in words is "one hundred thirty-five thousand, five hundred eighty-eight".