12503303 has 4 divisors (see below), whose sum is σ = 12531600. Its totient is φ = 12475008.

The previous prime is 12503297. The next prime is 12503317. The reversal of 12503303 is 30330521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12503303 - 2⁸ = 12503047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12503903) 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 3 ways as a sum of consecutive naturals, for example, 13475 + ... + 14372.

It is an arithmetic number, because the mean of its divisors is an integer number (3132900).

Almost surely, 2^12503303 is an apocalyptic number.

12503303 is a deficient number, since it is larger than the sum of its proper divisors (28297).

12503303 is an equidigital number, since it uses as much as digits as its factorization.

12503303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28296.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 12503303 is about 3536.0009898189. Note that the first 3 decimals coincide. The cubic root of 12503303 is about 232.0998814376.

Adding to 12503303 its reverse (30330521), we get a palindrome (42833824).

The spelling of 12503303 in words is "twelve million, five hundred three thousand, three hundred three".