12271571 has 4 divisors (see below), whose sum is σ = 13215552. Its totient is φ = 11327592.

The previous prime is 12271561. The next prime is 12271573. The reversal of 12271571 is 17517221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17517221 = 19 ⋅921959.

It is a cyclic number.

It is not a de Polignac number, because 12271571 - 2⁶ = 12271507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12271571.

It is not an unprimeable number, because it can be changed into a prime (12271573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471971 + ... + 471996.

It is an arithmetic number, because the mean of its divisors is an integer number (3303888).

Almost surely, 2^12271571 is an apocalyptic number.

12271571 is a deficient number, since it is larger than the sum of its proper divisors (943981).

12271571 is an equidigital number, since it uses as much as digits as its factorization.

12271571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943980.

The product of its digits is 980, while the sum is 26.

The square root of 12271571 is about 3503.0802160385. The cubic root of 12271571 is about 230.6570437234.

Adding to 12271571 its reverse (17517221), we get a palindrome (29788792).

The spelling of 12271571 in words is "twelve million, two hundred seventy-one thousand, five hundred seventy-one".