129905104 has 80 divisors (see below), whose sum is σ = 302837760. Its totient is φ = 52778880.

The previous prime is 129905101. The next prime is 129905117. The reversal of 129905104 is 401509921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129905101) 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, 543417 + ... + 543655.

It is an arithmetic number, because the mean of its divisors is an integer number (3785472).

Almost surely, 2^129905104 is an apocalyptic number.

129905104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129905104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151418880).

129905104 is an abundant number, since it is smaller than the sum of its proper divisors (172932656).

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

129905104 is a wasteful number, since it uses less digits than its factorization.

129905104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 129905104 is about 11397.5920263887. The cubic root of 129905104 is about 506.4564093735.

The spelling of 129905104 in words is "one hundred twenty-nine million, nine hundred five thousand, one hundred four".