12105563 has 2 divisors, whose sum is σ = 12105564. Its totient is φ = 12105562.

The previous prime is 12105553. The next prime is 12105601. The reversal of 12105563 is 36550121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12105563 - 2⁸ = 12105307 is a prime.

It is not a weakly prime, because it can be changed into another prime (12105523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6052781 + 6052782.

It is an arithmetic number, because the mean of its divisors is an integer number (6052782).

Almost surely, 2^12105563 is an apocalyptic number.

12105563 is a deficient number, since it is larger than the sum of its proper divisors (1).

12105563 is an equidigital number, since it uses as much as digits as its factorization.

12105563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 12105563 is about 3479.3049593274. The cubic root of 12105563 is about 229.6122199160.

Adding to 12105563 its reverse (36550121), we get a palindrome (48655684).

It can be divided in two parts, 121055 and 63, that multiplied together give a triangular number (7626465 = T₃₉₀₅).

The spelling of 12105563 in words is "twelve million, one hundred five thousand, five hundred sixty-three".