12821503 has 2 divisors, whose sum is σ = 12821504. Its totient is φ = 12821502.

The previous prime is 12821491. The next prime is 12821521. The reversal of 12821503 is 30512821.

It is a weak prime.

It is an emirp because it is prime and its reverse (30512821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12821503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12821533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410751 + 6410752.

It is an arithmetic number, because the mean of its divisors is an integer number (6410752).

Almost surely, 2^12821503 is an apocalyptic number.

12821503 is a deficient number, since it is larger than the sum of its proper divisors (1).

12821503 is an equidigital number, since it uses as much as digits as its factorization.

12821503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 12821503 is about 3580.7126385679. The cubic root of 12821503 is about 234.0523356774.

The spelling of 12821503 in words is "twelve million, eight hundred twenty-one thousand, five hundred three".