12803643 has 16 divisors (see below), whose sum is σ = 19238400. Its totient is φ = 8414280.

The previous prime is 12803611. The next prime is 12803653. The reversal of 12803643 is 34630821.

It is a happy number.

12803643 is a `hidden beast` number, since 12 + 8 + 0 + 3 + 643 = 666.

It is not a de Polignac number, because 12803643 - 2⁵ = 12803611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12803653) 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, 1423 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (1202400).

Almost surely, 2^12803643 is an apocalyptic number.

12803643 is a deficient number, since it is larger than the sum of its proper divisors (6434757).

12803643 is an equidigital number, since it uses as much as digits as its factorization.

12803643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6759 (or 6753 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 12803643 is about 3578.2178525070. The cubic root of 12803643 is about 233.9436090283.

The spelling of 12803643 in words is "twelve million, eight hundred three thousand, six hundred forty-three".