13240503 has 20 divisors (see below), whose sum is σ = 20420928. Its totient is φ = 8540640.

The previous prime is 13240489. The next prime is 13240519. The reversal of 13240503 is 30504231.

It is not a de Polignac number, because 13240503 - 2¹³ = 13232311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 126 + ... + 5147.

Almost surely, 2^13240503 is an apocalyptic number.

13240503 is a deficient number, since it is larger than the sum of its proper divisors (7180425).

13240503 is an equidigital number, since it uses as much as digits as its factorization.

13240503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316 (or 5307 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 13240503 is about 3638.7501975266. The cubic root of 13240503 is about 236.5746255419.

Adding to 13240503 its reverse (30504231), we get a palindrome (43744734).

The spelling of 13240503 in words is "thirteen million, two hundred forty thousand, five hundred three".