135239 has 8 divisors (see below), whose sum is σ = 148512. Its totient is φ = 122400.

The previous prime is 135221. The next prime is 135241. The reversal of 135239 is 932531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135239 - 2¹² = 131143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262 + ... + 1364.

It is an arithmetic number, because the mean of its divisors is an integer number (18564).

2¹³⁵²³⁹ is an apocalyptic number.

135239 is a deficient number, since it is larger than the sum of its proper divisors (13273).

135239 is a wasteful number, since it uses less digits than its factorization.

135239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217.

The product of its digits is 810, while the sum is 23.

The square root of 135239 is about 367.7485554016. The cubic root of 135239 is about 51.3295334606.

The spelling of 135239 in words is "one hundred thirty-five thousand, two hundred thirty-nine".