12466221 has 16 divisors (see below), whose sum is σ = 17054400.
Its totient is φ = 8097408.
The previous prime is 12466211. The next prime is 12466241. The reversal of 12466221 is 12266421.
12466221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is not a de Polignac number, because 12466221 - 213 = 12458029 is a prime.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 12466191 and 12466200.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12466211) 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 15 ways as a sum of consecutive naturals, for example, 21625 + ... + 22193.
It is an arithmetic number, because the mean of its divisors is an integer number (1065900).
Almost surely, 212466221 is an apocalyptic number.
It is an amenable number.
12466221 is a deficient number, since it is larger than the sum of its proper divisors (4588179).
12466221 is a wasteful number, since it uses less digits than its factorization.
12466221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 748.
The product of its digits is 1152, while the sum is 24.
The square root of 12466221 is about 3530.7536022781.
The cubic root of 12466221 is about 231.8702021176.
The spelling of 12466221 in words is "twelve million, four hundred sixty-six thousand, two hundred twenty-one".