129112064 has 48 divisors (see below), whose sum is σ = 269483760. Its totient is φ = 61726720.

The previous prime is 129112007. The next prime is 129112079. The reversal of 129112064 is 460211921.

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, 45734 + ... + 48474.

It is an arithmetic number, because the mean of its divisors is an integer number (5614245).

Almost surely, 2^129112064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129112064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134741880).

129112064 is an abundant number, since it is smaller than the sum of its proper divisors (140371696).

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

129112064 is an equidigital number, since it uses as much as digits as its factorization.

129112064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786 (or 2766 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 129112064 is about 11362.7489631691. The cubic root of 129112064 is about 505.4237060952.

Adding to 129112064 its reverse (460211921), we get a palindrome (589323985).

The spelling of 129112064 in words is "one hundred twenty-nine million, one hundred twelve thousand, sixty-four".