12036565 has 12 divisors (see below), whose sum is σ = 14738724. Its totient is φ = 9436544.

The previous prime is 12036553. The next prime is 12036601. The reversal of 12036565 is 56563021.

It can be written as a sum of positive squares in 6 ways, for example, as 1943236 + 10093329 = 1394^2 + 3177^2 .

It is not a de Polignac number, because 12036565 - 2⁹ = 12036053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13617 + ... + 14473.

It is an arithmetic number, because the mean of its divisors is an integer number (1228227).

Almost surely, 2^12036565 is an apocalyptic number.

It is an amenable number.

12036565 is a deficient number, since it is larger than the sum of its proper divisors (2702159).

12036565 is an frugal number, since it uses more digits than its factorization.

12036565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968 (or 915 counting only the distinct ones).

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

The square root of 12036565 is about 3469.3753039993. The cubic root of 12036565 is about 229.1751487035.

Adding to 12036565 its reverse (56563021), we get a palindrome (68599586).

The spelling of 12036565 in words is "twelve million, thirty-six thousand, five hundred sixty-five".