12271247 has 2 divisors, whose sum is σ = 12271248. Its totient is φ = 12271246.

The previous prime is 12271219. The next prime is 12271261. The reversal of 12271247 is 74217221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12271247 - 2¹⁴ = 12254863 is a prime.

It is a Chen prime.

It is equal to p₈₀₄₆₅₃ and since 12271247 and 804653 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12271447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6135623 + 6135624.

It is an arithmetic number, because the mean of its divisors is an integer number (6135624).

Almost surely, 2^12271247 is an apocalyptic number.

12271247 is a deficient number, since it is larger than the sum of its proper divisors (1).

12271247 is an equidigital number, since it uses as much as digits as its factorization.

12271247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1568, while the sum is 26.

The square root of 12271247 is about 3503.0339707174. The cubic root of 12271247 is about 230.6550137323.

Adding to 12271247 its reverse (74217221), we get a palindrome (86488468).

The spelling of 12271247 in words is "twelve million, two hundred seventy-one thousand, two hundred forty-seven".