129707142 has 8 divisors (see below), whose sum is σ = 259414296. Its totient is φ = 43235712.

The previous prime is 129707141. The next prime is 129707173. The reversal of 129707142 is 241707921.

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

129707142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129707141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10808923 + ... + 10808934.

It is an arithmetic number, because the mean of its divisors is an integer number (32426787).

Almost surely, 2^129707142 is an apocalyptic number.

129707142 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.

129707142 is a wasteful number, since it uses less digits than its factorization.

129707142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21617862.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 129707142 is about 11388.9043371169. The cubic root of 129707142 is about 506.1990161124.

The spelling of 129707142 in words is "one hundred twenty-nine million, seven hundred seven thousand, one hundred forty-two".