129016265 has 24 divisors (see below), whose sum is σ = 185916672. Its totient is φ = 85609440.

The previous prime is 129016249. The next prime is 129016291. The reversal of 129016265 is 562610921.

It is a happy number.

It is not a de Polignac number, because 129016265 - 2⁴ = 129016249 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 899 + ... + 16088.

It is an arithmetic number, because the mean of its divisors is an integer number (7746528).

Almost surely, 2^129016265 is an apocalyptic number.

It is an amenable number.

129016265 is a deficient number, since it is larger than the sum of its proper divisors (56900407).

129016265 is a wasteful number, since it uses less digits than its factorization.

129016265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17037 (or 17030 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 129016265 is about 11358.5326957314. The cubic root of 129016265 is about 505.2986698426.

The spelling of 129016265 in words is "one hundred twenty-nine million, sixteen thousand, two hundred sixty-five".