12543803 has 4 divisors (see below), whose sum is σ = 12551040. Its totient is φ = 12536568.

The previous prime is 12543799. The next prime is 12543823. The reversal of 12543803 is 30834521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12543803 - 2² = 12543799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12543823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 701 + ... + 5057.

It is an arithmetic number, because the mean of its divisors is an integer number (3137760).

Almost surely, 2^12543803 is an apocalyptic number.

12543803 is a deficient number, since it is larger than the sum of its proper divisors (7237).

12543803 is an equidigital number, since it uses as much as digits as its factorization.

12543803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7236.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 12543803 is about 3541.7231681768. The cubic root of 12543803 is about 232.3502129982.

The spelling of 12543803 in words is "twelve million, five hundred forty-three thousand, eight hundred three".