126671771 has 2 divisors, whose sum is σ = 126671772. Its totient is φ = 126671770.

The previous prime is 126671759. The next prime is 126671791. The reversal of 126671771 is 177176621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126671771 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126671731) 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, 63335885 + 63335886.

It is an arithmetic number, because the mean of its divisors is an integer number (63335886).

Almost surely, 2^126671771 is an apocalyptic number.

126671771 is a deficient number, since it is larger than the sum of its proper divisors (1).

126671771 is an equidigital number, since it uses as much as digits as its factorization.

126671771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 38.

The square root of 126671771 is about 11254.8554410974. The cubic root of 126671771 is about 502.2191640502.

It can be divided in two parts, 1266 and 71771, that added together give a palindrome (73037).

The spelling of 126671771 in words is "one hundred twenty-six million, six hundred seventy-one thousand, seven hundred seventy-one".