129162 has 32 divisors (see below), whose sum is σ = 299520. Its totient is φ = 36720.

The previous prime is 129127. The next prime is 129169. The reversal of 129162 is 261921.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (129169) by changing a digit.

129162 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203 + ... + 1305.

It is an arithmetic number, because the mean of its divisors is an integer number (9360).

2¹²⁹¹⁶² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149760).

129162 is an abundant number, since it is smaller than the sum of its proper divisors (170358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129162 is a wasteful number, since it uses less digits than its factorization.

129162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138.

The product of its digits is 216, while the sum is 21.

The square root of 129162 is about 359.3911518109. The cubic root of 129162 is about 50.5488857727.

The spelling of 129162 in words is "one hundred twenty-nine thousand, one hundred sixty-two".