129227 has 4 divisors (see below), whose sum is σ = 147696. Its totient is φ = 110760.

The previous prime is 129223. The next prime is 129229. The reversal of 129227 is 722921.

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 129227 - 2² = 129223 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 129227.

It is not an unprimeable number, because it can be changed into a prime (129221) 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 in 3 ways as a sum of consecutive naturals, for example, 9224 + ... + 9237.

It is an arithmetic number, because the mean of its divisors is an integer number (36924).

2¹²⁹²²⁷ is an apocalyptic number.

129227 is a deficient number, since it is larger than the sum of its proper divisors (18469).

129227 is an equidigital number, since it uses as much as digits as its factorization.

129227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18468.

The product of its digits is 504, while the sum is 23.

The square root of 129227 is about 359.4815711549. The cubic root of 129227 is about 50.5573638250.

The spelling of 129227 in words is "one hundred twenty-nine thousand, two hundred twenty-seven".