129112 has 8 divisors (see below), whose sum is σ = 242100. Its totient is φ = 64552.

The previous prime is 129097. The next prime is 129113. The reversal of 129112 is 211921.

It is a tau number, because it is divible by the number of its divisors (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 polite number, since it can be written as a sum of consecutive naturals, namely, 8062 + ... + 8077.

2¹²⁹¹¹² is an apocalyptic number.

It is an amenable number.

129112 is a deficient number, since it is larger than the sum of its proper divisors (112988).

129112 is a wasteful number, since it uses less digits than its factorization.

129112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16145 (or 16141 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 129112 is about 359.3215829866. The cubic root of 129112 is about 50.5423622583.

The spelling of 129112 in words is "one hundred twenty-nine thousand, one hundred twelve".