126271289 has 2 divisors, whose sum is σ = 126271290. Its totient is φ = 126271288.

The previous prime is 126271279. The next prime is 126271319. The reversal of 126271289 is 982172621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118091689 + 8179600 = 10867^2 + 2860^2 .

It is an emirp because it is prime and its reverse (982172621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126271289 - 2⁴ = 126271273 is a prime.

It is not a weakly prime, because it can be changed into another prime (126271259) 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, 63135644 + 63135645.

It is an arithmetic number, because the mean of its divisors is an integer number (63135645).

Almost surely, 2^126271289 is an apocalyptic number.

It is an amenable number.

126271289 is a deficient number, since it is larger than the sum of its proper divisors (1).

126271289 is an equidigital number, since it uses as much as digits as its factorization.

126271289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 126271289 is about 11237.0498352548. The cubic root of 126271289 is about 501.6893378471.

The spelling of 126271289 in words is "one hundred twenty-six million, two hundred seventy-one thousand, two hundred eighty-nine".