135959 has 4 divisors (see below), whose sum is σ = 137760. Its totient is φ = 134160.

The previous prime is 135937. The next prime is 135977. The reversal of 135959 is 959531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 959531 = 17 ⋅56443.

It is a cyclic number.

It is not a de Polignac number, because 135959 - 2¹⁶ = 70423 is a prime.

It is a super-3 number, since 3×135959³ = 7539545033337237, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135929) 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, 782 + ... + 939.

It is an arithmetic number, because the mean of its divisors is an integer number (34440).

2¹³⁵⁹⁵⁹ is an apocalyptic number.

135959 is a deficient number, since it is larger than the sum of its proper divisors (1801).

135959 is an equidigital number, since it uses as much as digits as its factorization.

135959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800.

The product of its digits is 6075, while the sum is 32.

The square root of 135959 is about 368.7261856717. The cubic root of 135959 is about 51.4204635219.

The spelling of 135959 in words is "one hundred thirty-five thousand, nine hundred fifty-nine".