129615104 has 72 divisors (see below), whose sum is σ = 271193832. Its totient is φ = 61767680.

The previous prime is 129615103. The next prime is 129615113. The reversal of 129615104 is 401516921.

It can be written as a sum of positive squares in 4 ways, for example, as 565504 + 129049600 = 752^2 + 11360^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129615103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556172 + ... + 556404.

It is an arithmetic number, because the mean of its divisors is an integer number (3766581).

Almost surely, 2^129615104 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 129615104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135596916).

129615104 is an abundant number, since it is smaller than the sum of its proper divisors (141578728).

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

129615104 is an equidigital number, since it uses as much as digits as its factorization.

129615104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 129615104 is about 11384.8629328596. The cubic root of 129615104 is about 506.0792576874.

The spelling of 129615104 in words is "one hundred twenty-nine million, six hundred fifteen thousand, one hundred four".