12644001 has 12 divisors (see below), whose sum is σ = 18853120. Its totient is φ = 8157240.

The previous prime is 12643999. The next prime is 12644017. The reversal of 12644001 is 10044621.

12644001 is a `hidden beast` number, since 1 + 264 + 400 + 1 = 666.

12644001 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12644001 - 2¹ = 12643999 is a prime.

It is a super-2 number, since 2×12644001² = 319741522576002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12644041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22381 + ... + 22938.

Almost surely, 2^12644001 is an apocalyptic number.

It is an amenable number.

12644001 is a deficient number, since it is larger than the sum of its proper divisors (6209119).

12644001 is a wasteful number, since it uses less digits than its factorization.

12644001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45356 (or 45353 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12644001 is about 3555.8404069924. The cubic root of 12644001 is about 232.9672324628.

Adding to 12644001 its reverse (10044621), we get a palindrome (22688622).

The spelling of 12644001 in words is "twelve million, six hundred forty-four thousand, one".