129182142 has 16 divisors (see below), whose sum is σ = 259280640. Its totient is φ = 42907992.

The previous prime is 129182117. The next prime is 129182149. The reversal of 129182142 is 241281921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129182149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36342 + ... + 39737.

It is an arithmetic number, because the mean of its divisors is an integer number (16205040).

Almost surely, 2^129182142 is an apocalyptic number.

129182142 is an abundant number, since it is smaller than the sum of its proper divisors (130098498).

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

129182142 is a wasteful number, since it uses less digits than its factorization.

129182142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76367.

The product of its digits is 2304, while the sum is 30.

The square root of 129182142 is about 11365.8322176601. The cubic root of 129182142 is about 505.5151322955.

The spelling of 129182142 in words is "one hundred twenty-nine million, one hundred eighty-two thousand, one hundred forty-two".