129055272 has 16 divisors (see below), whose sum is σ = 322638240. Its totient is φ = 43018416.

The previous prime is 129055271. The next prime is 129055273. The reversal of 129055272 is 272550921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129055271) and next prime (129055273).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (129055271) 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, 2688628 + ... + 2688675.

It is an arithmetic number, because the mean of its divisors is an integer number (20164890).

Almost surely, 2^129055272 is an apocalyptic number.

129055272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129055272 is an abundant number, since it is smaller than the sum of its proper divisors (193582968).

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

129055272 is a wasteful number, since it uses less digits than its factorization.

129055272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377312 (or 5377308 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 129055272 is about 11360.2496451442. The cubic root of 129055272 is about 505.3495890016.

The spelling of 129055272 in words is "one hundred twenty-nine million, fifty-five thousand, two hundred seventy-two".