129140166 has 8 divisors (see below), whose sum is σ = 258280344. Its totient is φ = 43046720.

The previous prime is 129140153. The next prime is 129140197. The reversal of 129140166 is 661041921.

It is a happy number.

129140166 is nontrivially palindromic in base 9.

It is a sphenic number, since it is the product of 3 distinct primes.

129140166 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10761675 + ... + 10761686.

It is an arithmetic number, because the mean of its divisors is an integer number (32285043).

Almost surely, 2^129140166 is an apocalyptic number.

129140166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129140166 is a wasteful number, since it uses less digits than its factorization.

129140166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21523366.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 129140166 is about 11363.9854804553. The cubic root of 129140166 is about 505.4603729157.

The spelling of 129140166 in words is "one hundred twenty-nine million, one hundred forty thousand, one hundred sixty-six".