12171065 has 24 divisors (see below), whose sum is σ = 16086600. Its totient is φ = 8808960.

The previous prime is 12171041. The next prime is 12171067. The reversal of 12171065 is 56017121.

12171065 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 753424 + 11417641 = 868^2 + 3379^2 .

It is not a de Polignac number, because 12171065 - 2¹⁶ = 12105529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12171065.

It is not an unprimeable number, because it can be changed into a prime (12171067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81611 + ... + 81759.

It is an arithmetic number, because the mean of its divisors is an integer number (670275).

Almost surely, 2^12171065 is an apocalyptic number.

It is an amenable number.

12171065 is a deficient number, since it is larger than the sum of its proper divisors (3915535).

12171065 is a wasteful number, since it uses less digits than its factorization.

12171065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 12171065 is about 3488.7053472599. The cubic root of 12171065 is about 230.0256115147.

Adding to 12171065 its reverse (56017121), we get a palindrome (68188186).

The spelling of 12171065 in words is "twelve million, one hundred seventy-one thousand, sixty-five".