129060864 has 130 divisors (see below), whose sum is σ = 386533290. Its totient is φ = 42909696.

The previous prime is 129060839. The next prime is 129060871. The reversal of 129060864 is 468060921.

It can be written as a sum of positive squares in only one way, i.e., 95883264 + 33177600 = 9792^2 + 5760^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 331582 + ... + 331970.

It is an arithmetic number, because the mean of its divisors is an integer number (2973333).

Almost surely, 2^129060864 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 129060864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193266645).

129060864 is an abundant number, since it is smaller than the sum of its proper divisors (257472426).

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

129060864 is an frugal number, since it uses more digits than its factorization.

129060864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 129060864 is about 11360.4957638300. The cubic root of 129060864 is about 505.3568878745.

The spelling of 129060864 in words is "one hundred twenty-nine million, sixty thousand, eight hundred sixty-four".