12808503 has 8 divisors (see below), whose sum is σ = 18975600. Its totient is φ = 8538984.

The previous prime is 12808501. The next prime is 12808511. The reversal of 12808503 is 30580821.

It is a happy number.

It is not a de Polignac number, because 12808503 - 2¹ = 12808501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 474389 = 12808503 / (1 + 2 + 8 + 0 + 8 + 5 + 0 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12808501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237168 + ... + 237221.

It is an arithmetic number, because the mean of its divisors is an integer number (2371950).

Almost surely, 2^12808503 is an apocalyptic number.

12808503 is a deficient number, since it is larger than the sum of its proper divisors (6167097).

12808503 is an equidigital number, since it uses as much as digits as its factorization.

12808503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474398 (or 474392 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 12808503 is about 3578.8968970899. The cubic root of 12808503 is about 233.9732053475.

The spelling of 12808503 in words is "twelve million, eight hundred eight thousand, five hundred three".