12447971 has 2 divisors, whose sum is σ = 12447972. Its totient is φ = 12447970.

The previous prime is 12447959. The next prime is 12447973. The reversal of 12447971 is 17974421.

It is a strong prime.

It is an emirp because it is prime and its reverse (17974421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12447971 - 2¹⁰ = 12446947 is a prime.

It is a super-3 number, since 3×12447971³ (a number of 22 digits) contains 333 as substring.

Together with 12447973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12447973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6223985 + 6223986.

It is an arithmetic number, because the mean of its divisors is an integer number (6223986).

Almost surely, 2^12447971 is an apocalyptic number.

12447971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12447971 is an equidigital number, since it uses as much as digits as its factorization.

12447971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 12447971 is about 3528.1682216130. The cubic root of 12447971 is about 231.7569975936.

The spelling of 12447971 in words is "twelve million, four hundred forty-seven thousand, nine hundred seventy-one".