12665305 has 8 divisors (see below), whose sum is σ = 15998400. Its totient is φ = 9598896.

The previous prime is 12665297. The next prime is 12665309. The reversal of 12665305 is 50356621.

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

It is a cyclic number.

It is not a de Polignac number, because 12665305 - 2³ = 12665297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12665309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66565 + ... + 66754.

It is an arithmetic number, because the mean of its divisors is an integer number (1999800).

Almost surely, 2^12665305 is an apocalyptic number.

It is an amenable number.

12665305 is a deficient number, since it is larger than the sum of its proper divisors (3333095).

12665305 is a wasteful number, since it uses less digits than its factorization.

12665305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133343.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 12665305 is about 3558.8347812170. The cubic root of 12665305 is about 233.0980019623.

The spelling of 12665305 in words is "twelve million, six hundred sixty-five thousand, three hundred five".