129042 has 24 divisors (see below), whose sum is σ = 286416. Its totient is φ = 41976.

The previous prime is 129037. The next prime is 129049. The reversal of 129042 is 240921.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (129049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1153 + ... + 1259.

It is an arithmetic number, because the mean of its divisors is an integer number (11934).

2¹²⁹⁰⁴² is an apocalyptic number.

129042 is an abundant number, since it is smaller than the sum of its proper divisors (157374).

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

129042 is a wasteful number, since it uses less digits than its factorization.

129042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 129042 is about 359.2241639979. The cubic root of 129042 is about 50.5332265081.

Adding to 129042 its reverse (240921), we get a palindrome (369963).

The spelling of 129042 in words is "one hundred twenty-nine thousand, forty-two".