13126643 has 2 divisors, whose sum is σ = 13126644. Its totient is φ = 13126642.

The previous prime is 13126639. The next prime is 13126657. The reversal of 13126643 is 34662131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13126643 - 2² = 13126639 is a prime.

It is not a weakly prime, because it can be changed into another prime (13126843) 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, 6563321 + 6563322.

It is an arithmetic number, because the mean of its divisors is an integer number (6563322).

Almost surely, 2^13126643 is an apocalyptic number.

13126643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13126643 is an equidigital number, since it uses as much as digits as its factorization.

13126643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 13126643 is about 3623.0709349942. The cubic root of 13126643 is about 235.8945413622.

Adding to 13126643 its reverse (34662131), we get a palindrome (47788774).

The spelling of 13126643 in words is "thirteen million, one hundred twenty-six thousand, six hundred forty-three".