129229 has 2 divisors, whose sum is σ = 129230. Its totient is φ = 129228.

The previous prime is 129223. The next prime is 129263. The reversal of 129229 is 922921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91204 + 38025 = 302^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 129229 - 2³ = 129221 is a prime.

129229 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 64614 + 64615.

It is an arithmetic number, because the mean of its divisors is an integer number (64615).

2¹²⁹²²⁹ is an apocalyptic number.

It is an amenable number.

129229 is a deficient number, since it is larger than the sum of its proper divisors (1).

129229 is an equidigital number, since it uses as much as digits as its factorization.

129229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 129229 is about 359.4843529279. The cubic root of 129229 is about 50.5576246431.

The spelling of 129229 in words is "one hundred twenty-nine thousand, two hundred twenty-nine".