129571 has 4 divisors (see below), whose sum is σ = 139552. Its totient is φ = 119592.

The previous prime is 129553. The next prime is 129581. The reversal of 129571 is 175921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129571 - 2⁵ = 129539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4971 + ... + 4996.

It is an arithmetic number, because the mean of its divisors is an integer number (34888).

2¹²⁹⁵⁷¹ is an apocalyptic number.

129571 is a deficient number, since it is larger than the sum of its proper divisors (9981).

129571 is an equidigital number, since it uses as much as digits as its factorization.

129571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9980.

The product of its digits is 630, while the sum is 25.

The square root of 129571 is about 359.9597199688. The cubic root of 129571 is about 50.6021850150.

The spelling of 129571 in words is "one hundred twenty-nine thousand, five hundred seventy-one".