12216242 has 8 divisors (see below), whose sum is σ = 18339696. Its totient is φ = 6103012.

The previous prime is 12216227. The next prime is 12216247. The reversal of 12216242 is 24261221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12216247) 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, 2213 + ... + 5415.

It is an arithmetic number, because the mean of its divisors is an integer number (2292462).

Almost surely, 2^12216242 is an apocalyptic number.

12216242 is a deficient number, since it is larger than the sum of its proper divisors (6123454).

12216242 is a wasteful number, since it uses less digits than its factorization.

12216242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112.

The product of its digits is 384, while the sum is 20.

The square root of 12216242 is about 3495.1741015291. The cubic root of 12216242 is about 230.3098659017.

Adding to 12216242 its reverse (24261221), we get a palindrome (36477463).

The spelling of 12216242 in words is "twelve million, two hundred sixteen thousand, two hundred forty-two".