135120239 has 4 divisors (see below), whose sum is σ = 140995056. Its totient is φ = 129245424.

The previous prime is 135120211. The next prime is 135120247. The reversal of 135120239 is 932021531.

135120239 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 an emirpimes, since its reverse is a distinct semiprime: 932021531 = 7 ⋅133145933.

It is a cyclic number.

It is not a de Polignac number, because 135120239 - 2⁸ = 135119983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135120259) 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, 2937374 + ... + 2937419.

It is an arithmetic number, because the mean of its divisors is an integer number (35248764).

Almost surely, 2^135120239 is an apocalyptic number.

135120239 is a deficient number, since it is larger than the sum of its proper divisors (5874817).

135120239 is an equidigital number, since it uses as much as digits as its factorization.

135120239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5874816.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 135120239 is about 11624.1231497262. The cubic root of 135120239 is about 513.1450394004.

The spelling of 135120239 in words is "one hundred thirty-five million, one hundred twenty thousand, two hundred thirty-nine".