12440503 has 4 divisors (see below), whose sum is σ = 12454960. Its totient is φ = 12426048.

The previous prime is 12440489. The next prime is 12440513. The reversal of 12440503 is 30504421.

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 12440503 - 2⁵ = 12440471 is a prime.

It is a super-2 number, since 2×12440503² = 309532229786018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440513) 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, 5850 + ... + 7687.

It is an arithmetic number, because the mean of its divisors is an integer number (3113740).

Almost surely, 2^12440503 is an apocalyptic number.

12440503 is a deficient number, since it is larger than the sum of its proper divisors (14457).

12440503 is an equidigital number, since it uses as much as digits as its factorization.

12440503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 12440503 is about 3527.1097232720. The cubic root of 12440503 is about 231.7106417795.

Adding to 12440503 its reverse (30504421), we get a palindrome (42944924).

The spelling of 12440503 in words is "twelve million, four hundred forty thousand, five hundred three".