12105817 has 2 divisors, whose sum is σ = 12105818. Its totient is φ = 12105816.

The previous prime is 12105811. The next prime is 12105827. The reversal of 12105817 is 71850121.

12105817 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 can be written as a sum of positive squares in only one way, i.e., 7070281 + 5035536 = 2659^2 + 2244^2 .

It is a cyclic number.

It is not a de Polignac number, because 12105817 - 2¹⁵ = 12073049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12105791 and 12105800.

It is not a weakly prime, because it can be changed into another prime (12105811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6052908 + 6052909.

It is an arithmetic number, because the mean of its divisors is an integer number (6052909).

Almost surely, 2^12105817 is an apocalyptic number.

It is an amenable number.

12105817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12105817 is an equidigital number, since it uses as much as digits as its factorization.

12105817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 12105817 is about 3479.3414606790. The cubic root of 12105817 is about 229.6138258195.

Adding to 12105817 its reverse (71850121), we get a palindrome (83955938).

The spelling of 12105817 in words is "twelve million, one hundred five thousand, eight hundred seventeen".