12107865 has 48 divisors (see below), whose sum is σ = 24361344. Its totient is φ = 5026560.

The previous prime is 12107863. The next prime is 12107869. The reversal of 12107865 is 56870121.

It is not a de Polignac number, because 12107865 - 2¹ = 12107863 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12107861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12229 + ... + 13181.

It is an arithmetic number, because the mean of its divisors is an integer number (507528).

Almost surely, 2^12107865 is an apocalyptic number.

12107865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12107865 is an abundant number, since it is smaller than the sum of its proper divisors (12253479).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12107865 is a wasteful number, since it uses less digits than its factorization.

12107865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 12107865 is about 3479.6357567998. The cubic root of 12107865 is about 229.6267733856.

Adding to 12107865 its reverse (56870121), we get a palindrome (68977986).

The spelling of 12107865 in words is "twelve million, one hundred seven thousand, eight hundred sixty-five".