126351971 has 2 divisors, whose sum is σ = 126351972. Its totient is φ = 126351970.

The previous prime is 126351943. The next prime is 126351991. The reversal of 126351971 is 179153621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126351971 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (126351941) 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, 63175985 + 63175986.

It is an arithmetic number, because the mean of its divisors is an integer number (63175986).

Almost surely, 2^126351971 is an apocalyptic number.

126351971 is a deficient number, since it is larger than the sum of its proper divisors (1).

126351971 is an equidigital number, since it uses as much as digits as its factorization.

126351971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 35.

The square root of 126351971 is about 11240.6392611808. The cubic root of 126351971 is about 501.7961678358.

The spelling of 126351971 in words is "one hundred twenty-six million, three hundred fifty-one thousand, nine hundred seventy-one".