129271 has 4 divisors (see below), whose sum is σ = 130032. Its totient is φ = 128512.

The previous prime is 129263. The next prime is 129277. The reversal of 129271 is 172921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 129271 - 2³ = 129263 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129277) 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 3 ways as a sum of consecutive naturals, for example, 6 + ... + 508.

It is an arithmetic number, because the mean of its divisors is an integer number (32508).

2¹²⁹²⁷¹ is an apocalyptic number.

129271 is a deficient number, since it is larger than the sum of its proper divisors (761).

129271 is an equidigital number, since it uses as much as digits as its factorization.

129271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760.

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

The square root of 129271 is about 359.5427651893. The cubic root of 129271 is about 50.5631012008.

It can be divided in two parts, 129 and 271, that added together give a square (400 = 20²).

The spelling of 129271 in words is "one hundred twenty-nine thousand, two hundred seventy-one".