12108145 has 24 divisors (see below), whose sum is σ = 17158824. Its totient is φ = 8176896.

The previous prime is 12108137. The next prime is 12108169. The reversal of 12108145 is 54180121.

It can be written as a sum of positive squares in 4 ways, for example, as 5143824 + 6964321 = 2268^2 + 2639^2 .

It is not a de Polignac number, because 12108145 - 2³ = 12108137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 17547 + ... + 18223.

It is an arithmetic number, because the mean of its divisors is an integer number (714951).

Almost surely, 2^12108145 is an apocalyptic number.

It is an amenable number.

12108145 is a deficient number, since it is larger than the sum of its proper divisors (5050679).

12108145 is an equidigital number, since it uses as much as digits as its factorization.

12108145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 12108145 is about 3479.6759906635. The cubic root of 12108145 is about 229.6285434472.

Adding to 12108145 its reverse (54180121), we get a palindrome (66288266).

The spelling of 12108145 in words is "twelve million, one hundred eight thousand, one hundred forty-five".