129481506 has 96 divisors (see below), whose sum is σ = 353553408. Its totient is φ = 33268320.

The previous prime is 129481489. The next prime is 129481507. The reversal of 129481506 is 605184921.

129481506 is a `hidden beast` number, since 129 + 481 + 50 + 6 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129481507) 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 47 ways as a sum of consecutive naturals, for example, 142305 + ... + 143211.

It is an arithmetic number, because the mean of its divisors is an integer number (3682848).

Almost surely, 2^129481506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129481506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176776704).

129481506 is an abundant number, since it is smaller than the sum of its proper divisors (224071902).

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

129481506 is a wasteful number, since it uses less digits than its factorization.

129481506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1033 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 129481506 is about 11378.9940680185. The cubic root of 129481506 is about 505.9053211181.

The spelling of 129481506 in words is "one hundred twenty-nine million, four hundred eighty-one thousand, five hundred six".