12281503 has 4 divisors (see below), whose sum is σ = 13226248. Its totient is φ = 11336760.

The previous prime is 12281483. The next prime is 12281519. The reversal of 12281503 is 30518221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30518221 = 1181 ⋅25841.

It is a cyclic number.

It is not a de Polignac number, because 12281503 - 2¹³ = 12273311 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 (12281573) 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, 472353 + ... + 472378.

It is an arithmetic number, because the mean of its divisors is an integer number (3306562).

Almost surely, 2^12281503 is an apocalyptic number.

12281503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12281503 is a deficient number, since it is larger than the sum of its proper divisors (944745).

12281503 is an equidigital number, since it uses as much as digits as its factorization.

12281503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944744.

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

The square root of 12281503 is about 3504.4975388777. The cubic root of 12281503 is about 230.7192543942.

Adding to 12281503 its reverse (30518221), we get a palindrome (42799724).

The spelling of 12281503 in words is "twelve million, two hundred eighty-one thousand, five hundred three".