129135 has 8 divisors (see below), whose sum is σ = 206640. Its totient is φ = 68864.

The previous prime is 129127. The next prime is 129169. The reversal of 129135 is 531921.

129135 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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 129135 - 2³ = 129127 is a prime.

It is an Ulam number.

129135 is strictly pandigital in base 7.

129135 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4290 + ... + 4319.

It is an arithmetic number, because the mean of its divisors is an integer number (25830).

2¹²⁹¹³⁵ is an apocalyptic number.

129135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129135 is a deficient number, since it is larger than the sum of its proper divisors (77505).

129135 is an equidigital number, since it uses as much as digits as its factorization.

129135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8617.

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

The square root of 129135 is about 359.3535863185. The cubic root of 129135 is about 50.5453632841.

It can be divided in two parts, 1291 and 35, that added together give a triangular number (1326 = T₅₁).

The spelling of 129135 in words is "one hundred twenty-nine thousand, one hundred thirty-five".