129126047 has 2 divisors, whose sum is σ = 129126048. Its totient is φ = 129126046.

The previous prime is 129126017. The next prime is 129126077. The reversal of 129126047 is 740621921.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (129126017) and next prime (129126077).

It is a cyclic number.

It is not a de Polignac number, because 129126047 - 2⁸ = 129125791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129126007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64563023 + 64563024.

It is an arithmetic number, because the mean of its divisors is an integer number (64563024).

Almost surely, 2^129126047 is an apocalyptic number.

129126047 is a deficient number, since it is larger than the sum of its proper divisors (1).

129126047 is an equidigital number, since it uses as much as digits as its factorization.

129126047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 129126047 is about 11363.3642465601. The cubic root of 129126047 is about 505.4419514456.

Adding to 129126047 its reverse (740621921), we get a palindrome (869747968).

The spelling of 129126047 in words is "one hundred twenty-nine million, one hundred twenty-six thousand, forty-seven".