126812171 has 2 divisors, whose sum is σ = 126812172. Its totient is φ = 126812170.

The previous prime is 126812159. The next prime is 126812201. The reversal of 126812171 is 171218621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126812171 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126812071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63406085 + 63406086.

It is an arithmetic number, because the mean of its divisors is an integer number (63406086).

Almost surely, 2^126812171 is an apocalyptic number.

126812171 is a deficient number, since it is larger than the sum of its proper divisors (1).

126812171 is an equidigital number, since it uses as much as digits as its factorization.

126812171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 29.

The square root of 126812171 is about 11261.0910217439. The cubic root of 126812171 is about 502.4046448273.

The spelling of 126812171 in words is "one hundred twenty-six million, eight hundred twelve thousand, one hundred seventy-one".