12240217 has 4 divisors (see below), whose sum is σ = 13352976. Its totient is φ = 11127460.

The previous prime is 12240203. The next prime is 12240223. The reversal of 12240217 is 71204221.

It is a happy number.

12240217 is digitally balanced in base 3, 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12240217 - 2¹⁹ = 11715929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12240194 and 12240203.

It is not an unprimeable number, because it can be changed into a prime (12240227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556363 + ... + 556384.

It is an arithmetic number, because the mean of its divisors is an integer number (3338244).

Almost surely, 2^12240217 is an apocalyptic number.

It is an amenable number.

12240217 is a deficient number, since it is larger than the sum of its proper divisors (1112759).

12240217 is a wasteful number, since it uses less digits than its factorization.

12240217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112758.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12240217 is about 3498.6021494305. The cubic root of 12240217 is about 230.4604324119.

Adding to 12240217 its reverse (71204221), we get a palindrome (83444438).

The spelling of 12240217 in words is "twelve million, two hundred forty thousand, two hundred seventeen".