126316129 has 2 divisors, whose sum is σ = 126316130. Its totient is φ = 126316128.

The previous prime is 126316087. The next prime is 126316139. The reversal of 126316129 is 921613621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77035729 + 49280400 = 8777^2 + 7020^2 .

It is a cyclic number.

It is not a de Polignac number, because 126316129 - 2⁹ = 126315617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126316129.

It is not a weakly prime, because it can be changed into another prime (126316139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63158064 + 63158065.

It is an arithmetic number, because the mean of its divisors is an integer number (63158065).

Almost surely, 2^126316129 is an apocalyptic number.

It is an amenable number.

126316129 is a deficient number, since it is larger than the sum of its proper divisors (1).

126316129 is an equidigital number, since it uses as much as digits as its factorization.

126316129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 126316129 is about 11239.0448437579. The cubic root of 126316129 is about 501.7487155246.

The spelling of 126316129 in words is "one hundred twenty-six million, three hundred sixteen thousand, one hundred twenty-nine".