12728803 has 4 divisors (see below), whose sum is σ = 13398760. Its totient is φ = 12058848.

The previous prime is 12728773. The next prime is 12728831. The reversal of 12728803 is 30882721.

12728803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30882721 = 23 ⋅1342727.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12728803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12728893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334950 + ... + 334987.

It is an arithmetic number, because the mean of its divisors is an integer number (3349690).

Almost surely, 2^12728803 is an apocalyptic number.

12728803 is a deficient number, since it is larger than the sum of its proper divisors (669957).

12728803 is an equidigital number, since it uses as much as digits as its factorization.

12728803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669956.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 12728803 is about 3567.7448058963. The cubic root of 12728803 is about 233.4869014015.

It can be divided in two parts, 12728 and 803, that added together give a palindrome (13531).

The spelling of 12728803 in words is "twelve million, seven hundred twenty-eight thousand, eight hundred three".