129401064 has 80 divisors (see below), whose sum is σ = 390348420. Its totient is φ = 39813120.

The previous prime is 129401029. The next prime is 129401071. The reversal of 129401064 is 460104921.

It can be written as a sum of positive squares in 2 ways, for example, as 129004164 + 396900 = 11358^2 + 630^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 744 + ... + 16104.

Almost surely, 2^129401064 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 129401064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195174210).

129401064 is an abundant number, since it is smaller than the sum of its proper divisors (260947356).

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

129401064 is a wasteful number, since it uses less digits than its factorization.

129401064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15392 (or 15379 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 129401064 is about 11375.4588478883. The cubic root of 129401064 is about 505.8005327519.

Adding to 129401064 its reverse (460104921), we get a palindrome (589505985).

The spelling of 129401064 in words is "one hundred twenty-nine million, four hundred one thousand, sixty-four".