12222565 has 4 divisors (see below), whose sum is σ = 14667084. Its totient is φ = 9778048.

The previous prime is 12222559. The next prime is 12222571. The reversal of 12222565 is 56522221.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (12222559) and next prime (12222571).

It can be written as a sum of positive squares in 2 ways, for example, as 5841889 + 6380676 = 2417^2 + 2526^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222565 - 2³ = 12222557 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1222252 + ... + 1222261.

It is an arithmetic number, because the mean of its divisors is an integer number (3666771).

Almost surely, 2^12222565 is an apocalyptic number.

It is an amenable number.

12222565 is a deficient number, since it is larger than the sum of its proper divisors (2444519).

12222565 is an equidigital number, since it uses as much as digits as its factorization.

12222565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444518.

The product of its digits is 2400, while the sum is 25.

The square root of 12222565 is about 3496.0785174249. The cubic root of 12222565 is about 230.3495943798.

Adding to 12222565 its reverse (56522221), we get a palindrome (68744786).

The spelling of 12222565 in words is "twelve million, two hundred twenty-two thousand, five hundred sixty-five".