126005243173 has 2 divisors, whose sum is σ = 126005243174. Its totient is φ = 126005243172.

The previous prime is 126005243167. The next prime is 126005243293. The reversal of 126005243173 is 371342500621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108964029409 + 17041213764 = 330097^2 + 130542^2 .

It is a cyclic number.

It is not a de Polignac number, because 126005243173 - 2²⁹ = 125468372261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126005246173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63002621586 + 63002621587.

It is an arithmetic number, because the mean of its divisors is an integer number (63002621587).

Almost surely, 2^126005243173 is an apocalyptic number.

It is an amenable number.

126005243173 is a deficient number, since it is larger than the sum of its proper divisors (1).

126005243173 is an equidigital number, since it uses as much as digits as its factorization.

126005243173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 126005243173 its reverse (371342500621), we get a palindrome (497347743794).

The spelling of 126005243173 in words is "one hundred twenty-six billion, five million, two hundred forty-three thousand, one hundred seventy-three".