129990272 has 16 divisors (see below), whose sum is σ = 258965250. Its totient is φ = 64995072.

The previous prime is 129990269. The next prime is 129990281. The reversal of 129990272 is 272099921.

It can be written as a sum of positive squares in only one way, i.e., 119596096 + 10394176 = 10936^2 + 3224^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507647 + ... + 507902.

Almost surely, 2^129990272 is an apocalyptic number.

It is an amenable number.

129990272 is a deficient number, since it is larger than the sum of its proper divisors (128974978).

129990272 is an equidigital number, since it uses as much as digits as its factorization.

129990272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015563 (or 1015551 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 129990272 is about 11401.3276419898. The cubic root of 129990272 is about 506.5670656786.

The spelling of 129990272 in words is "one hundred twenty-nine million, nine hundred ninety thousand, two hundred seventy-two".