12240243 has 6 divisors (see below), whose sum is σ = 17680364. Its totient is φ = 8160156.

The previous prime is 12240227. The next prime is 12240271. The reversal of 12240243 is 34204221.

It is not a de Polignac number, because 12240243 - 2⁴ = 12240227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12240203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 680005 + ... + 680022.

Almost surely, 2^12240243 is an apocalyptic number.

12240243 is a deficient number, since it is larger than the sum of its proper divisors (5440121).

12240243 is a wasteful number, since it uses less digits than its factorization.

12240243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360033 (or 1360030 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12240243 is about 3498.6058651983. The cubic root of 12240243 is about 230.4605955889.

Adding to 12240243 its reverse (34204221), we get a palindrome (46444464).

The spelling of 12240243 in words is "twelve million, two hundred forty thousand, two hundred forty-three".