12245665 has 4 divisors (see below), whose sum is σ = 14694804. Its totient is φ = 9796528.

The previous prime is 12245663. The next prime is 12245707. The reversal of 12245665 is 56654221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6718464 + 5527201 = 2592^2 + 2351^2 .

It is a cyclic number.

It is not a de Polignac number, because 12245665 - 2¹ = 12245663 is a prime.

It is a super-2 number, since 2×12245665² = 299912622584450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12245663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1224562 + ... + 1224571.

It is an arithmetic number, because the mean of its divisors is an integer number (3673701).

Almost surely, 2^12245665 is an apocalyptic number.

It is an amenable number.

12245665 is a deficient number, since it is larger than the sum of its proper divisors (2449139).

12245665 is an equidigital number, since it uses as much as digits as its factorization.

12245665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449138.

The product of its digits is 14400, while the sum is 31.

The square root of 12245665 is about 3499.3806594882. The cubic root of 12245665 is about 230.4946192297.

Adding to 12245665 its reverse (56654221), we get a palindrome (68899886).

It can be divided in two parts, 1224 and 5665, that added together give a square (6889 = 83²).

The spelling of 12245665 in words is "twelve million, two hundred forty-five thousand, six hundred sixty-five".