129140198 has 32 divisors (see below), whose sum is σ = 215550720. Its totient is φ = 57537760.

The previous prime is 129140197. The next prime is 129140213. The reversal of 129140198 is 891041921.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129140197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359543 + ... + 359901.

It is an arithmetic number, because the mean of its divisors is an integer number (6735960).

Almost surely, 2^129140198 is an apocalyptic number.

129140198 is a deficient number, since it is larger than the sum of its proper divisors (86410522).

129140198 is a wasteful number, since it uses less digits than its factorization.

129140198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 129140198 is about 11363.9868884120. The cubic root of 129140198 is about 505.4604146655.

Subtracting from 129140198 its sum of digits (35), we obtain a 17-th power (129140163 = 3¹⁷).

The spelling of 129140198 in words is "one hundred twenty-nine million, one hundred forty thousand, one hundred ninety-eight".