129329142 has 32 divisors (see below), whose sum is σ = 261660672. Its totient is φ = 42612864.

The previous prime is 129329131. The next prime is 129329147. The reversal of 129329142 is 241923921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129329147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337483 + ... + 337865.

It is an arithmetic number, because the mean of its divisors is an integer number (8176896).

Almost surely, 2^129329142 is an apocalyptic number.

129329142 is an abundant number, since it is smaller than the sum of its proper divisors (132331530).

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

129329142 is a wasteful number, since it uses less digits than its factorization.

129329142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its digits is 7776, while the sum is 33.

The square root of 129329142 is about 11372.2971294282. The cubic root of 129329142 is about 505.7068062486.

The spelling of 129329142 in words is "one hundred twenty-nine million, three hundred twenty-nine thousand, one hundred forty-two".