129101142 has 8 divisors (see below), whose sum is σ = 258202296. Its totient is φ = 43033712.

The previous prime is 129101117. The next prime is 129101153. The reversal of 129101142 is 241101921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

129101142 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10758423 + ... + 10758434.

It is an arithmetic number, because the mean of its divisors is an integer number (32275287).

Almost surely, 2^129101142 is an apocalyptic number.

129101142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129101142 is a wasteful number, since it uses less digits than its factorization.

129101142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21516862.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 129101142 is about 11362.2683474736. The cubic root of 129101142 is about 505.4094538938.

The spelling of 129101142 in words is "one hundred twenty-nine million, one hundred one thousand, one hundred forty-two".