129046865 has 16 divisors (see below), whose sum is σ = 158578560. Its totient is φ = 100780800.

The previous prime is 129046843. The next prime is 129046873. The reversal of 129046865 is 568640921.

It is a happy number.

It is not a de Polignac number, because 129046865 - 2¹⁰ = 129045841 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 15 ways as a sum of consecutive naturals, for example, 43097 + ... + 45993.

It is an arithmetic number, because the mean of its divisors is an integer number (9911160).

Almost surely, 2^129046865 is an apocalyptic number.

It is an amenable number.

129046865 is a deficient number, since it is larger than the sum of its proper divisors (29531695).

129046865 is a wasteful number, since it uses less digits than its factorization.

129046865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 129046865 is about 11359.8796208411. The cubic root of 129046865 is about 505.3386154960.

The spelling of 129046865 in words is "one hundred twenty-nine million, forty-six thousand, eight hundred sixty-five".