12216426 has 8 divisors (see below), whose sum is σ = 24432864. Its totient is φ = 4072140.

The previous prime is 12216419. The next prime is 12216431. The reversal of 12216426 is 62461221.

12216426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

12216426 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12216396 and 12216405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018030 + ... + 1018041.

It is an arithmetic number, because the mean of its divisors is an integer number (3054108).

Almost surely, 2^12216426 is an apocalyptic number.

12216426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12216426 is a wasteful number, since it uses less digits than its factorization.

12216426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036076.

The product of its digits is 1152, while the sum is 24.

The square root of 12216426 is about 3495.2004234378. The cubic root of 12216426 is about 230.3110221985.

Adding to 12216426 its reverse (62461221), we get a palindrome (74677647).

The spelling of 12216426 in words is "twelve million, two hundred sixteen thousand, four hundred twenty-six".