12105917 has 2 divisors, whose sum is σ = 12105918. Its totient is φ = 12105916.

The previous prime is 12105893. The next prime is 12105923. The reversal of 12105917 is 71950121.

12105917 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8797156 + 3308761 = 2966^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 12105917 - 2¹² = 12101821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12105817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6052958 + 6052959.

It is an arithmetic number, because the mean of its divisors is an integer number (6052959).

Almost surely, 2^12105917 is an apocalyptic number.

It is an amenable number.

12105917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12105917 is an equidigital number, since it uses as much as digits as its factorization.

12105917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 12105917 is about 3479.3558311848. The cubic root of 12105917 is about 229.6144580587.

The spelling of 12105917 in words is "twelve million, one hundred five thousand, nine hundred seventeen".