12108105 has 12 divisors (see below), whose sum is σ = 20987460. Its totient is φ = 6457632.

The previous prime is 12108091. The next prime is 12108113. The reversal of 12108105 is 50180121.

It can be written as a sum of positive squares in 2 ways, for example, as 8433216 + 3674889 = 2904^2 + 1917^2 .

It is not a de Polignac number, because 12108105 - 2¹⁷ = 11977033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134490 + ... + 134579.

It is an arithmetic number, because the mean of its divisors is an integer number (1748955).

Almost surely, 2^12108105 is an apocalyptic number.

12108105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12108105 is a deficient number, since it is larger than the sum of its proper divisors (8879355).

12108105 is a wasteful number, since it uses less digits than its factorization.

12108105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269080 (or 269077 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 12108105 is about 3479.6702429972. The cubic root of 12108105 is about 229.6282905829.

Adding to 12108105 its reverse (50180121), we get a palindrome (62288226).

The spelling of 12108105 in words is "twelve million, one hundred eight thousand, one hundred five".