12195641 has 2 divisors, whose sum is σ = 12195642. Its totient is φ = 12195640.

The previous prime is 12195637. The next prime is 12195643. The reversal of 12195641 is 14659121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8970025 + 3225616 = 2995^2 + 1796^2 .

It is an emirp because it is prime and its reverse (14659121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12195641 - 2² = 12195637 is a prime.

Together with 12195643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12195643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6097820 + 6097821.

It is an arithmetic number, because the mean of its divisors is an integer number (6097821).

Almost surely, 2^12195641 is an apocalyptic number.

It is an amenable number.

12195641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12195641 is an equidigital number, since it uses as much as digits as its factorization.

12195641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 12195641 is about 3492.2257945328. The cubic root of 12195641 is about 230.1803311645.

The spelling of 12195641 in words is "twelve million, one hundred ninety-five thousand, six hundred forty-one".