129342906 has 80 divisors (see below), whose sum is σ = 361373760. Its totient is φ = 33592320.

The previous prime is 129342887. The next prime is 129342907. The reversal of 129342906 is 609243921.

It is not an unprimeable number, because it can be changed into a prime (129342907) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7290 + ... + 17658.

It is an arithmetic number, because the mean of its divisors is an integer number (4517172).

Almost surely, 2^129342906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129342906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180686880).

129342906 is an abundant number, since it is smaller than the sum of its proper divisors (232030854).

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

129342906 is a wasteful number, since it uses less digits than its factorization.

129342906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10401 (or 10392 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 129342906 is about 11372.9022681108. The cubic root of 129342906 is about 505.7247457516.

The spelling of 129342906 in words is "one hundred twenty-nine million, three hundred forty-two thousand, nine hundred six".