129008250 has 96 divisors (see below), whose sum is σ = 398721024. Its totient is φ = 29484000.

The previous prime is 129008183. The next prime is 129008261. The reversal of 129008250 is 52800921.

It is a Curzon number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 11655 + ... + 19845.

It is an arithmetic number, because the mean of its divisors is an integer number (4153344).

Almost surely, 2^129008250 is an apocalyptic number.

129008250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129008250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199360512).

129008250 is an abundant number, since it is smaller than the sum of its proper divisors (269712774).

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

129008250 is a wasteful number, since it uses less digits than its factorization.

129008250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8221 (or 8208 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 129008250 is about 11358.1798717928. The cubic root of 129008250 is about 505.2882059094.

The spelling of 129008250 in words is "one hundred twenty-nine million, eight thousand, two hundred fifty".