129044765 has 8 divisors (see below), whose sum is σ = 154936320. Its totient is φ = 103180752.

The previous prime is 129044759. The next prime is 129044767. The reversal of 129044765 is 567440921.

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 129044765 - 2¹⁰ = 129043741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129044767) by changing a digit.

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, 5432 + ... + 16958.

It is an arithmetic number, because the mean of its divisors is an integer number (19367040).

Almost surely, 2^129044765 is an apocalyptic number.

It is an amenable number.

129044765 is a deficient number, since it is larger than the sum of its proper divisors (25891555).

129044765 is a wasteful number, since it uses less digits than its factorization.

129044765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13771.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 129044765 is about 11359.7871899081. The cubic root of 129044765 is about 505.3358743294.

The spelling of 129044765 in words is "one hundred twenty-nine million, forty-four thousand, seven hundred sixty-five".