129665122 has 16 divisors (see below), whose sum is σ = 203224320. Its totient is φ = 61931232.

The previous prime is 129665117. The next prime is 129665141. The reversal of 129665122 is 221566921.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 46438 + ... + 49150.

It is an arithmetic number, because the mean of its divisors is an integer number (12701520).

Almost surely, 2^129665122 is an apocalyptic number.

129665122 is a deficient number, since it is larger than the sum of its proper divisors (73559198).

129665122 is a wasteful number, since it uses less digits than its factorization.

129665122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777.

The product of its digits is 12960, while the sum is 34.

The square root of 129665122 is about 11387.0594096984. The cubic root of 129665122 is about 506.1443473674.

The spelling of 129665122 in words is "one hundred twenty-nine million, six hundred sixty-five thousand, one hundred twenty-two".