12885665 has 8 divisors (see below), whose sum is σ = 16652328. Its totient is φ = 9515520.

The previous prime is 12885623. The next prime is 12885671. The reversal of 12885665 is 56658821.

It can be written as a sum of positive squares in 4 ways, for example, as 614656 + 12271009 = 784^2 + 3503^2 .

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

It is not a de Polignac number, because 12885665 - 2⁸ = 12885409 is a prime.

It is a Duffinian number.

It is a Curzon 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, 99056 + ... + 99185.

It is an arithmetic number, because the mean of its divisors is an integer number (2081541).

Almost surely, 2^12885665 is an apocalyptic number.

It is an amenable number.

12885665 is a deficient number, since it is larger than the sum of its proper divisors (3766663).

12885665 is a wasteful number, since it uses less digits than its factorization.

12885665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198259.

The product of its digits is 115200, while the sum is 41.

The square root of 12885665 is about 3589.6608474896. The cubic root of 12885665 is about 234.4421049924.

The spelling of 12885665 in words is "twelve million, eight hundred eighty-five thousand, six hundred sixty-five".