12117571 has 2 divisors, whose sum is σ = 12117572. Its totient is φ = 12117570.

The previous prime is 12117569. The next prime is 12117607. The reversal of 12117571 is 17571121.

12117571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (17571121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12117571 - 2¹ = 12117569 is a prime.

Together with 12117569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12117551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6058785 + 6058786.

It is an arithmetic number, because the mean of its divisors is an integer number (6058786).

Almost surely, 2^12117571 is an apocalyptic number.

12117571 is a deficient number, since it is larger than the sum of its proper divisors (1).

12117571 is an equidigital number, since it uses as much as digits as its factorization.

12117571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 490, while the sum is 25.

The square root of 12117571 is about 3481.0301636154. The cubic root of 12117571 is about 229.6881153916.

Adding to 12117571 its reverse (17571121), we get a palindrome (29688692).

The spelling of 12117571 in words is "twelve million, one hundred seventeen thousand, five hundred seventy-one".