126271381 has 2 divisors, whose sum is σ = 126271382. Its totient is φ = 126271380.

The previous prime is 126271367. The next prime is 126271447. The reversal of 126271381 is 183172621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89000356 + 37271025 = 9434^2 + 6105^2 .

It is a cyclic number.

It is not a de Polignac number, because 126271381 - 2⁹ = 126270869 is a prime.

It is a super-2 number, since 2×126271381² = 31888923319294322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126271361) 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, 63135690 + 63135691.

It is an arithmetic number, because the mean of its divisors is an integer number (63135691).

Almost surely, 2^126271381 is an apocalyptic number.

It is an amenable number.

126271381 is a deficient number, since it is larger than the sum of its proper divisors (1).

126271381 is an equidigital number, since it uses as much as digits as its factorization.

126271381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 126271381 is about 11237.0539288552. The cubic root of 126271381 is about 501.6894596890.

The spelling of 126271381 in words is "one hundred twenty-six million, two hundred seventy-one thousand, three hundred eighty-one".