129424271 has 2 divisors, whose sum is σ = 129424272. Its totient is φ = 129424270.

The previous prime is 129424223. The next prime is 129424283. The reversal of 129424271 is 172424921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129424271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129424291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64712135 + 64712136.

It is an arithmetic number, because the mean of its divisors is an integer number (64712136).

Almost surely, 2^129424271 is an apocalyptic number.

129424271 is a deficient number, since it is larger than the sum of its proper divisors (1).

129424271 is an equidigital number, since it uses as much as digits as its factorization.

129424271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 129424271 is about 11376.4788489233. The cubic root of 129424271 is about 505.8307679781.

The spelling of 129424271 in words is "one hundred twenty-nine million, four hundred twenty-four thousand, two hundred seventy-one".