13812503 has 4 divisors (see below), whose sum is σ = 14133768. Its totient is φ = 13491240.

The previous prime is 13812481. The next prime is 13812511. The reversal of 13812503 is 30521831.

13812503 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: 30521831 = 1097 ⋅27823.

It is a cyclic number.

It is not a de Polignac number, because 13812503 - 2¹⁴ = 13796119 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 (13812583) 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, 160568 + ... + 160653.

It is an arithmetic number, because the mean of its divisors is an integer number (3533442).

Almost surely, 2^13812503 is an apocalyptic number.

13812503 is a deficient number, since it is larger than the sum of its proper divisors (321265).

13812503 is an equidigital number, since it uses as much as digits as its factorization.

13812503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321264.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 13812503 is about 3716.5175904333. The cubic root of 13812503 is about 239.9334479820.

The spelling of 13812503 in words is "thirteen million, eight hundred twelve thousand, five hundred three".