129118 has 8 divisors (see below), whose sum is σ = 211320. Its totient is φ = 58680.

The previous prime is 129113. The next prime is 129119. The reversal of 129118 is 811921.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 5869 = 129118 / (1 + 2 + 9 + 1 + 1 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2913 + ... + 2956.

It is an arithmetic number, because the mean of its divisors is an integer number (26415).

2¹²⁹¹¹⁸ is an apocalyptic number.

129118 is a deficient number, since it is larger than the sum of its proper divisors (82202).

129118 is a wasteful number, since it uses less digits than its factorization.

129118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882.

The product of its digits is 144, while the sum is 22.

The square root of 129118 is about 359.3299319567. The cubic root of 129118 is about 50.5431451690.

The spelling of 129118 in words is "one hundred twenty-nine thousand, one hundred eighteen".