12805165 has 8 divisors (see below), whose sum is σ = 16270200. Its totient is φ = 9641472.

The previous prime is 12805147. The next prime is 12805187. The reversal of 12805165 is 56150821.

It can be written as a sum of positive squares in 4 ways, for example, as 3108169 + 9696996 = 1763^2 + 3114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12805165 is a prime.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 75240 + ... + 75409.

It is an arithmetic number, because the mean of its divisors is an integer number (2033775).

Almost surely, 2^12805165 is an apocalyptic number.

It is an amenable number.

12805165 is a deficient number, since it is larger than the sum of its proper divisors (3465035).

12805165 is a wasteful number, since it uses less digits than its factorization.

12805165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150671.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 12805165 is about 3578.4305218908. The cubic root of 12805165 is about 233.9528784752.

Adding to 12805165 its reverse (56150821), we get a palindrome (68955986).

The spelling of 12805165 in words is "twelve million, eight hundred five thousand, one hundred sixty-five".