126503213 has 2 divisors, whose sum is σ = 126503214. Its totient is φ = 126503212.

The previous prime is 126503149. The next prime is 126503227. The reversal of 126503213 is 312305621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125507209 + 996004 = 11203^2 + 998^2 .

It is a cyclic number.

It is not a de Polignac number, because 126503213 - 2⁶ = 126503149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126503413) 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, 63251606 + 63251607.

It is an arithmetic number, because the mean of its divisors is an integer number (63251607).

Almost surely, 2^126503213 is an apocalyptic number.

It is an amenable number.

126503213 is a deficient number, since it is larger than the sum of its proper divisors (1).

126503213 is an equidigital number, since it uses as much as digits as its factorization.

126503213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 126503213 is about 11247.3647135674. The cubic root of 126503213 is about 501.9963029415.

Adding to 126503213 its reverse (312305621), we get a palindrome (438808834).

The spelling of 126503213 in words is "one hundred twenty-six million, five hundred three thousand, two hundred thirteen".