12547643 has 2 divisors, whose sum is σ = 12547644. Its totient is φ = 12547642.

The previous prime is 12547609. The next prime is 12547679. The reversal of 12547643 is 34674521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12547643 - 2¹⁰ = 12546619 is a prime.

It is not a weakly prime, because it can be changed into another prime (12547603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6273821 + 6273822.

It is an arithmetic number, because the mean of its divisors is an integer number (6273822).

Almost surely, 2^12547643 is an apocalyptic number.

12547643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12547643 is an equidigital number, since it uses as much as digits as its factorization.

12547643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 12547643 is about 3542.2652356931. The cubic root of 12547643 is about 232.3739201570.

The spelling of 12547643 in words is "twelve million, five hundred forty-seven thousand, six hundred forty-three".