129765071 has 2 divisors, whose sum is σ = 129765072. Its totient is φ = 129765070.

The previous prime is 129765047. The next prime is 129765091. The reversal of 129765071 is 170567921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129765071 - 2¹⁸ = 129502927 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129765001) by changing a digit.

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 as a sum of consecutive naturals, namely, 64882535 + 64882536.

It is an arithmetic number, because the mean of its divisors is an integer number (64882536).

Almost surely, 2^129765071 is an apocalyptic number.

129765071 is a deficient number, since it is larger than the sum of its proper divisors (1).

129765071 is an equidigital number, since it uses as much as digits as its factorization.

129765071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 129765071 is about 11391.4472741614. The cubic root of 129765071 is about 506.2743633857.

The spelling of 129765071 in words is "one hundred twenty-nine million, seven hundred sixty-five thousand, seventy-one".