135659 has 4 divisors (see below), whose sum is σ = 136416. Its totient is φ = 134904.

The previous prime is 135649. The next prime is 135661. The reversal of 135659 is 956531.

135659 is nontrivially palindromic in base 13.

135659 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 956531 = 263 ⋅3637.

It is a cyclic number.

It is not a de Polignac number, because 135659 - 2⁸ = 135403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62 + ... + 524.

It is an arithmetic number, because the mean of its divisors is an integer number (34104).

2¹³⁵⁶⁵⁹ is an apocalyptic number.

135659 is a deficient number, since it is larger than the sum of its proper divisors (757).

135659 is an equidigital number, since it uses as much as digits as its factorization.

135659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its digits is 4050, while the sum is 29.

The square root of 135659 is about 368.3191550816. The cubic root of 135659 is about 51.3826151040.

The spelling of 135659 in words is "one hundred thirty-five thousand, six hundred fifty-nine".