129141872 has 40 divisors (see below), whose sum is σ = 270116640. Its totient is φ = 59628800.

The previous prime is 129141869. The next prime is 129141907. The reversal of 129141872 is 278141921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4622 + ... + 16722.

It is an arithmetic number, because the mean of its divisors is an integer number (6752916).

Almost surely, 2^129141872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129141872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135058320).

129141872 is an abundant number, since it is smaller than the sum of its proper divisors (140974768).

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

129141872 is a wasteful number, since it uses less digits than its factorization.

129141872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12161 (or 12155 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 129141872 is about 11364.0605419014. The cubic root of 129141872 is about 505.4625986926.

The spelling of 129141872 in words is "one hundred twenty-nine million, one hundred forty-one thousand, eight hundred seventy-two".