129127 has 2 divisors, whose sum is σ = 129128. Its totient is φ = 129126.

The previous prime is 129121. The next prime is 129169. The reversal of 129127 is 721921.

It is a weak prime.

It is an emirp because it is prime and its reverse (721921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129127 - 2³ = 129119 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 129098 and 129107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129121) 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, 64563 + 64564.

It is an arithmetic number, because the mean of its divisors is an integer number (64564).

2¹²⁹¹²⁷ is an apocalyptic number.

129127 is a deficient number, since it is larger than the sum of its proper divisors (1).

129127 is an equidigital number, since it uses as much as digits as its factorization.

129127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 22.

The square root of 129127 is about 359.3424550481. The cubic root of 129127 is about 50.5443194895.

It can be divided in two parts, 129 and 127, that added together give a 8-th power (256 = 2⁸).

The spelling of 129127 in words is "one hundred twenty-nine thousand, one hundred twenty-seven".