129642568 has 32 divisors (see below), whose sum is σ = 269536320. Its totient is φ = 57960000.

The previous prime is 129642563. The next prime is 129642571. The reversal of 129642568 is 865246921.

It is not an unprimeable number, because it can be changed into a prime (129642563) 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, 6708 + ... + 17443.

It is an arithmetic number, because the mean of its divisors is an integer number (8423010).

Almost surely, 2^129642568 is an apocalyptic number.

It is an amenable number.

129642568 is an abundant number, since it is smaller than the sum of its proper divisors (139893752).

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

129642568 is a wasteful number, since it uses less digits than its factorization.

129642568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24229 (or 24225 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 129642568 is about 11386.0690319355. The cubic root of 129642568 is about 506.1149993532.

The spelling of 129642568 in words is "one hundred twenty-nine million, six hundred forty-two thousand, five hundred sixty-eight".