129200050 has 24 divisors (see below), whose sum is σ = 274643136. Its totient is φ = 44297040.

The previous prime is 129200047. The next prime is 129200059. The reversal of 129200050 is 50002921.

It is not an unprimeable number, because it can be changed into a prime (129200059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184222 + ... + 184921.

It is an arithmetic number, because the mean of its divisors is an integer number (11443464).

Almost surely, 2^129200050 is an apocalyptic number.

129200050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129200050 is an abundant number, since it is smaller than the sum of its proper divisors (145443086).

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

129200050 is a wasteful number, since it uses less digits than its factorization.

129200050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369162 (or 369157 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 129200050 is about 11366.6199901290. The cubic root of 129200050 is about 505.5384903917.

Adding to 129200050 its reverse (50002921), we get a palindrome (179202971).

The spelling of 129200050 in words is "one hundred twenty-nine million, two hundred thousand, fifty".