129467521 has 2 divisors, whose sum is σ = 129467522. Its totient is φ = 129467520.

The previous prime is 129467509. The next prime is 129467531. The reversal of 129467521 is 125764921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116964225 + 12503296 = 10815^2 + 3536^2 .

It is a cyclic number.

It is not a de Polignac number, because 129467521 - 2¹¹ = 129465473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129467531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64733760 + 64733761.

It is an arithmetic number, because the mean of its divisors is an integer number (64733761).

Almost surely, 2^129467521 is an apocalyptic number.

It is an amenable number.

129467521 is a deficient number, since it is larger than the sum of its proper divisors (1).

129467521 is an equidigital number, since it uses as much as digits as its factorization.

129467521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 129467521 is about 11378.3795419207. The cubic root of 129467521 is about 505.8871065718.

The spelling of 129467521 in words is "one hundred twenty-nine million, four hundred sixty-seven thousand, five hundred twenty-one".