12644285 has 4 divisors (see below), whose sum is σ = 15173148. Its totient is φ = 10115424.

The previous prime is 12644267. The next prime is 12644293. The reversal of 12644285 is 58244621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58244621 = 1213 ⋅48017.

It can be written as a sum of positive squares in 2 ways, for example, as 1747684 + 10896601 = 1322^2 + 3301^2 .

It is a cyclic number.

It is not a de Polignac number, because 12644285 - 2¹⁸ = 12382141 is a prime.

It is a super-2 number, since 2×12644285² = 319755886322450, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1264424 + ... + 1264433.

It is an arithmetic number, because the mean of its divisors is an integer number (3793287).

Almost surely, 2^12644285 is an apocalyptic number.

It is an amenable number.

12644285 is a deficient number, since it is larger than the sum of its proper divisors (2528863).

12644285 is an equidigital number, since it uses as much as digits as its factorization.

12644285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2528862.

The product of its digits is 15360, while the sum is 32.

The square root of 12644285 is about 3555.8803410689. The cubic root of 12644285 is about 232.9689766944.

The spelling of 12644285 in words is "twelve million, six hundred forty-four thousand, two hundred eighty-five".