12665071 has 2 divisors, whose sum is σ = 12665072. Its totient is φ = 12665070.

The previous prime is 12665069. The next prime is 12665087. The reversal of 12665071 is 17056621.

It is a weak prime.

It is an emirp because it is prime and its reverse (17056621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12665071 - 2¹ = 12665069 is a prime.

Together with 12665069, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12665041) 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, 6332535 + 6332536.

It is an arithmetic number, because the mean of its divisors is an integer number (6332536).

Almost surely, 2^12665071 is an apocalyptic number.

12665071 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665071 is an equidigital number, since it uses as much as digits as its factorization.

12665071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12665071 is about 3558.8019051361. The cubic root of 12665071 is about 233.0965664062.

The spelling of 12665071 in words is "twelve million, six hundred sixty-five thousand, seventy-one".