12748643 has 2 divisors, whose sum is σ = 12748644. Its totient is φ = 12748642.

The previous prime is 12748607. The next prime is 12748649. The reversal of 12748643 is 34684721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12748643 - 2⁶ = 12748579 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12748649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6374321 + 6374322.

It is an arithmetic number, because the mean of its divisors is an integer number (6374322).

Almost surely, 2^12748643 is an apocalyptic number.

12748643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12748643 is an equidigital number, since it uses as much as digits as its factorization.

12748643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 12748643 is about 3570.5241912078. The cubic root of 12748643 is about 233.6081480844.

The spelling of 12748643 in words is "twelve million, seven hundred forty-eight thousand, six hundred forty-three".