129166872 has 32 divisors (see below), whose sum is σ = 323232000. Its totient is φ = 43013664.

The previous prime is 129166847. The next prime is 129166903. The reversal of 129166872 is 278661921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31653 + ... + 35499.

It is an arithmetic number, because the mean of its divisors is an integer number (10101000).

Almost surely, 2^129166872 is an apocalyptic number.

129166872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129166872 is an abundant number, since it is smaller than the sum of its proper divisors (194065128).

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

129166872 is a wasteful number, since it uses less digits than its factorization.

129166872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255 (or 5251 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 129166872 is about 11365.1604476136. The cubic root of 129166872 is about 505.4952133394.

The spelling of 129166872 in words is "one hundred twenty-nine million, one hundred sixty-six thousand, eight hundred seventy-two".