129321259 has 2 divisors, whose sum is σ = 129321260. Its totient is φ = 129321258.

The previous prime is 129321251. The next prime is 129321263. The reversal of 129321259 is 952123921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129321259 - 2³ = 129321251 is a prime.

It is not a weakly prime, because it can be changed into another prime (129321251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64660629 + 64660630.

It is an arithmetic number, because the mean of its divisors is an integer number (64660630).

Almost surely, 2^129321259 is an apocalyptic number.

129321259 is a deficient number, since it is larger than the sum of its proper divisors (1).

129321259 is an equidigital number, since it uses as much as digits as its factorization.

129321259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 129321259 is about 11371.9505362976. The cubic root of 129321259 is about 505.6965312565.

The spelling of 129321259 in words is "one hundred twenty-nine million, three hundred twenty-one thousand, two hundred fifty-nine".