129764845 has 24 divisors (see below), whose sum is σ = 180238464. Its totient is φ = 87855168.

The previous prime is 129764819. The next prime is 129764857. The reversal of 129764845 is 548467921.

It is not a de Polignac number, because 129764845 - 2⁷ = 129764717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129764795 and 129764804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 776952 + ... + 777118.

It is an arithmetic number, because the mean of its divisors is an integer number (7509936).

Almost surely, 2^129764845 is an apocalyptic number.

It is an amenable number.

129764845 is a deficient number, since it is larger than the sum of its proper divisors (50473619).

129764845 is an equidigital number, since it uses as much as digits as its factorization.

129764845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 328 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 129764845 is about 11391.4373544343. The cubic root of 129764845 is about 506.2740694749.

It can be divided in two parts, 1297 and 64845, that multiplied together give a triangular number (84103965 = T₁₂₉₆₉).

The spelling of 129764845 in words is "one hundred twenty-nine million, seven hundred sixty-four thousand, eight hundred forty-five".