12636265 has 4 divisors (see below), whose sum is σ = 15163524. Its totient is φ = 10109008.

The previous prime is 12636263. The next prime is 12636271. The reversal of 12636265 is 56263621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56263621 = 347 ⋅162143.

It can be written as a sum of positive squares in 2 ways, for example, as 5308416 + 7327849 = 2304^2 + 2707^2 .

It is a cyclic number.

It is not a de Polignac number, because 12636265 - 2¹ = 12636263 is a prime.

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 (12636263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263622 + ... + 1263631.

It is an arithmetic number, because the mean of its divisors is an integer number (3790881).

Almost surely, 2^12636265 is an apocalyptic number.

It is an amenable number.

12636265 is a deficient number, since it is larger than the sum of its proper divisors (2527259).

12636265 is an equidigital number, since it uses as much as digits as its factorization.

12636265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527258.

The product of its digits is 12960, while the sum is 31.

The square root of 12636265 is about 3554.7524527033. The cubic root of 12636265 is about 232.9197105275.

Adding to 12636265 its reverse (56263621), we get a palindrome (68899886).

The spelling of 12636265 in words is "twelve million, six hundred thirty-six thousand, two hundred sixty-five".