129167872 has 40 divisors (see below), whose sum is σ = 264130416. Its totient is φ = 63071232.

The previous prime is 129167869. The next prime is 129167873. The reversal of 129167872 is 278761921.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (129167873) 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, 19083 + ... + 24949.

Almost surely, 2^129167872 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 129167872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132065208).

129167872 is an abundant number, since it is smaller than the sum of its proper divisors (134962544).

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

129167872 is an frugal number, since it uses more digits than its factorization.

129167872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5928 (or 5912 counting only the distinct ones).

The product of its digits is 84672, while the sum is 43.

The square root of 129167872 is about 11365.2044416280. The cubic root of 129167872 is about 505.4965178377.

The spelling of 129167872 in words is "one hundred twenty-nine million, one hundred sixty-seven thousand, eight hundred seventy-two".