135129 has 8 divisors (see below), whose sum is σ = 186112. Its totient is φ = 87120.

The previous prime is 135119. The next prime is 135131. The reversal of 135129 is 921531.

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

It is not a de Polignac number, because 135129 - 2⁸ = 134873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135119) 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, 634 + ... + 819.

It is an arithmetic number, because the mean of its divisors is an integer number (23264).

2¹³⁵¹²⁹ is an apocalyptic number.

It is an amenable number.

135129 is a deficient number, since it is larger than the sum of its proper divisors (50983).

135129 is a wasteful number, since it uses less digits than its factorization.

135129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487.

The product of its digits is 270, while the sum is 21.

The square root of 135129 is about 367.5989662662. The cubic root of 135129 is about 51.3156129687.

The spelling of 135129 in words is "one hundred thirty-five thousand, one hundred twenty-nine".