129671 has 2 divisors, whose sum is σ = 129672. Its totient is φ = 129670.

The previous prime is 129643. The next prime is 129707. The reversal of 129671 is 176921.

It is a weak prime.

It is an emirp because it is prime and its reverse (176921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129671 - 2⁶ = 129607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64835 + 64836.

It is an arithmetic number, because the mean of its divisors is an integer number (64836).

2¹²⁹⁶⁷¹ is an apocalyptic number.

129671 is a deficient number, since it is larger than the sum of its proper divisors (1).

129671 is an equidigital number, since it uses as much as digits as its factorization.

129671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 26.

The square root of 129671 is about 360.0985976090. The cubic root of 129671 is about 50.6151995457.

The spelling of 129671 in words is "one hundred twenty-nine thousand, six hundred seventy-one".