12644203 has 16 divisors (see below), whose sum is σ = 15372000. Its totient is φ = 10241280.

The previous prime is 12644201. The next prime is 12644207. The reversal of 12644203 is 30244621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12644203 - 2¹ = 12644201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12644201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2623 + ... + 5671.

It is an arithmetic number, because the mean of its divisors is an integer number (960750).

Almost surely, 2^12644203 is an apocalyptic number.

12644203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12644203 is a deficient number, since it is larger than the sum of its proper divisors (2727797).

12644203 is a wasteful number, since it uses less digits than its factorization.

12644203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 12644203 is about 3555.8688108534. The cubic root of 12644203 is about 232.9684730809.

Adding to 12644203 its reverse (30244621), we get a palindrome (42888824).

The spelling of 12644203 in words is "twelve million, six hundred forty-four thousand, two hundred three".