129481072 has 40 divisors (see below), whose sum is σ = 288997376. Its totient is φ = 55048896.

The previous prime is 129481069. The next prime is 129481073. The reversal of 129481072 is 270184921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129481073) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 9673 + ... + 18775.

Almost surely, 2^129481072 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 129481072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144498688).

129481072 is an abundant number, since it is smaller than the sum of its proper divisors (159516304).

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

129481072 is a wasteful number, since it uses less digits than its factorization.

129481072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9245 (or 9239 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 129481072 is about 11378.9749977755. The cubic root of 129481072 is about 505.9047558812.

The spelling of 129481072 in words is "one hundred twenty-nine million, four hundred eighty-one thousand, seventy-two".