129004165 has 8 divisors (see below), whose sum is σ = 156544920. Its totient is φ = 102043392.

The previous prime is 129004153. The next prime is 129004193. The reversal of 129004165 is 561400921.

It is a Cunningham number, because it is equal to 11358²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 24780484 + 104223681 = 4978^2 + 10209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129004165 - 2⁵ = 129004133 is a prime.

It is a congruent 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, 144504 + ... + 145393.

It is an arithmetic number, because the mean of its divisors is an integer number (19568115).

Almost surely, 2^129004165 is an apocalyptic number.

It is an amenable number.

129004165 is a deficient number, since it is larger than the sum of its proper divisors (27540755).

129004165 is an equidigital number, since it uses as much as digits as its factorization.

129004165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289991.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 129004165 is about 11358.0000440218. Note that the first 4 decimals coincide. The cubic root of 129004165 is about 505.2828725965.

The spelling of 129004165 in words is "one hundred twenty-nine million, four thousand, one hundred sixty-five".