129671272 has 16 divisors (see below), whose sum is σ = 243281700. Its totient is φ = 64796160.

The previous prime is 129671239. The next prime is 129671279. The reversal of 129671272 is 272176921.

It can be written as a sum of positive squares in 2 ways, for example, as 129640996 + 30276 = 11386^2 + 174^2 .

It is not an unprimeable number, because it can be changed into a prime (129671279) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12754 + ... + 20542.

Almost surely, 2^129671272 is an apocalyptic number.

It is an amenable number.

129671272 is a deficient number, since it is larger than the sum of its proper divisors (113610428).

129671272 is a wasteful number, since it uses less digits than its factorization.

129671272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9876 (or 9872 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 129671272 is about 11387.3294498754. The cubic root of 129671272 is about 506.1523493613.

The spelling of 129671272 in words is "one hundred twenty-nine million, six hundred seventy-one thousand, two hundred seventy-two".