126226013 has 2 divisors, whose sum is σ = 126226014. Its totient is φ = 126226012.

The previous prime is 126226007. The next prime is 126226021. The reversal of 126226013 is 310622621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117570649 + 8655364 = 10843^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 126226013 - 2⁴ = 126225997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126226013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126226073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63113006 + 63113007.

It is an arithmetic number, because the mean of its divisors is an integer number (63113007).

Almost surely, 2^126226013 is an apocalyptic number.

It is an amenable number.

126226013 is a deficient number, since it is larger than the sum of its proper divisors (1).

126226013 is an equidigital number, since it uses as much as digits as its factorization.

126226013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 126226013 is about 11235.0350689261. The cubic root of 126226013 is about 501.6293685486.

Adding to 126226013 its reverse (310622621), we get a palindrome (436848634).

The spelling of 126226013 in words is "one hundred twenty-six million, two hundred twenty-six thousand, thirteen".