12645667 has 2 divisors, whose sum is σ = 12645668. Its totient is φ = 12645666.

The previous prime is 12645649. The next prime is 12645707. The reversal of 12645667 is 76654621.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (76654621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12645667 - 2¹¹ = 12643619 is a prime.

It is not a weakly prime, because it can be changed into another prime (12645967) 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, 6322833 + 6322834.

It is an arithmetic number, because the mean of its divisors is an integer number (6322834).

Almost surely, 2^12645667 is an apocalyptic number.

12645667 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645667 is an equidigital number, since it uses as much as digits as its factorization.

12645667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 12645667 is about 3556.0746617584. The cubic root of 12645667 is about 232.9774640965.

The spelling of 12645667 in words is "twelve million, six hundred forty-five thousand, six hundred sixty-seven".