12243947 has 4 divisors (see below), whose sum is σ = 12255000. Its totient is φ = 12232896.

The previous prime is 12243937. The next prime is 12243971. The reversal of 12243947 is 74934221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74934221 = 1373 ⋅54577.

It is a cyclic number.

It is not a de Polignac number, because 12243947 - 2⁶ = 12243883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12243937) 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, 3653 + ... + 6150.

It is an arithmetic number, because the mean of its divisors is an integer number (3063750).

Almost surely, 2^12243947 is an apocalyptic number.

12243947 is a deficient number, since it is larger than the sum of its proper divisors (11053).

12243947 is an equidigital number, since it uses as much as digits as its factorization.

12243947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11052.

The product of its digits is 12096, while the sum is 32.

The square root of 12243947 is about 3499.1351788692. The cubic root of 12243947 is about 230.4838396796.

It can be divided in two parts, 1224394 and 7, that multiplied together give a palindrome (8570758).

The spelling of 12243947 in words is "twelve million, two hundred forty-three thousand, nine hundred forty-seven".