126218161 has 2 divisors, whose sum is σ = 126218162. Its totient is φ = 126218160.

The previous prime is 126218119. The next prime is 126218167. The reversal of 126218161 is 161812621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87778161 + 38440000 = 9369^2 + 6200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126218161 is a prime.

It is not a weakly prime, because it can be changed into another prime (126218167) 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, 63109080 + 63109081.

It is an arithmetic number, because the mean of its divisors is an integer number (63109081).

Almost surely, 2^126218161 is an apocalyptic number.

It is an amenable number.

126218161 is a deficient number, since it is larger than the sum of its proper divisors (1).

126218161 is an equidigital number, since it uses as much as digits as its factorization.

126218161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 28.

The square root of 126218161 is about 11234.6856208797. The cubic root of 126218161 is about 501.6189669011.

The spelling of 126218161 in words is "one hundred twenty-six million, two hundred eighteen thousand, one hundred sixty-one".