126634217 has 2 divisors, whose sum is σ = 126634218. Its totient is φ = 126634216.

The previous prime is 126634181. The next prime is 126634219. The reversal of 126634217 is 712436621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125529616 + 1104601 = 11204^2 + 1051^2 .

It is a cyclic number.

It is not a de Polignac number, because 126634217 - 2⁸ = 126633961 is a prime.

Together with 126634219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126634219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63317108 + 63317109.

It is an arithmetic number, because the mean of its divisors is an integer number (63317109).

Almost surely, 2^126634217 is an apocalyptic number.

It is an amenable number.

126634217 is a deficient number, since it is larger than the sum of its proper divisors (1).

126634217 is an equidigital number, since it uses as much as digits as its factorization.

126634217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 126634217 is about 11253.1869708096. The cubic root of 126634217 is about 502.1695286751.

The spelling of 126634217 in words is "one hundred twenty-six million, six hundred thirty-four thousand, two hundred seventeen".