12243971 has 2 divisors, whose sum is σ = 12243972. Its totient is φ = 12243970.

The previous prime is 12243937. The next prime is 12243983. The reversal of 12243971 is 17934221.

It is a strong prime.

It is an emirp because it is prime and its reverse (17934221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12243971 is a prime.

It is not a weakly prime, because it can be changed into another prime (12243991) 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, 6121985 + 6121986.

It is an arithmetic number, because the mean of its divisors is an integer number (6121986).

Almost surely, 2^12243971 is an apocalyptic number.

12243971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12243971 is an equidigital number, since it uses as much as digits as its factorization.

12243971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 12243971 is about 3499.1386082863. The cubic root of 12243971 is about 230.4839902740.

The spelling of 12243971 in words is "twelve million, two hundred forty-three thousand, nine hundred seventy-one".