12644811 has 6 divisors (see below), whose sum is σ = 18264740. Its totient is φ = 8429868.

The previous prime is 12644809. The next prime is 12644831. The reversal of 12644811 is 11844621.

It is a happy number.

12644811 is a `hidden beast` number, since 1 + 2 + 644 + 8 + 11 = 666.

12644811 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12644811 - 2¹ = 12644809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12644831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702481 + ... + 702498.

Almost surely, 2^12644811 is an apocalyptic number.

12644811 is a deficient number, since it is larger than the sum of its proper divisors (5619929).

12644811 is a wasteful number, since it uses less digits than its factorization.

12644811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404985 (or 1404982 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 12644811 is about 3555.9543022935. The cubic root of 12644811 is about 232.9722071389.

The spelling of 12644811 in words is "twelve million, six hundred forty-four thousand, eight hundred eleven".