12247643 has 4 divisors (see below), whose sum is σ = 12546408. Its totient is φ = 11948880.

The previous prime is 12247637. The next prime is 12247649. The reversal of 12247643 is 34674221.

12247643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34674221 = 19 ⋅1824959.

It is an interprime number because it is at equal distance from previous prime (12247637) and next prime (12247649).

It is a cyclic number.

It is not a de Polignac number, because 12247643 - 2⁶ = 12247579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12247649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149321 + ... + 149402.

It is an arithmetic number, because the mean of its divisors is an integer number (3136602).

Almost surely, 2^12247643 is an apocalyptic number.

12247643 is a deficient number, since it is larger than the sum of its proper divisors (298765).

12247643 is an equidigital number, since it uses as much as digits as its factorization.

12247643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298764.

The product of its digits is 8064, while the sum is 29.

The square root of 12247643 is about 3499.6632695161. The cubic root of 12247643 is about 230.5070288949.

The spelling of 12247643 in words is "twelve million, two hundred forty-seven thousand, six hundred forty-three".