12421226 has 4 divisors (see below), whose sum is σ = 18631842. Its totient is φ = 6210612.

The previous prime is 12421223. The next prime is 12421229. The reversal of 12421226 is 62212421.

It is a happy number.

12421226 is digitally balanced in base 2, 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.

It is an interprime number because it is at equal distance from previous prime (12421223) and next prime (12421229).

It can be written as a sum of positive squares in only one way, i.e., 11895601 + 525625 = 3449^2 + 725^2 .

It is a Curzon number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 12421198 and 12421207.

It is not an unprimeable number, because it can be changed into a prime (12421223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105305 + ... + 3105308.

Almost surely, 2^12421226 is an apocalyptic number.

12421226 is a deficient number, since it is larger than the sum of its proper divisors (6210616).

12421226 is an equidigital number, since it uses as much as digits as its factorization.

12421226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210615.

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

The square root of 12421226 is about 3524.3759731334. The cubic root of 12421226 is about 231.5908986274.

Adding to 12421226 its reverse (62212421), we get a palindrome (74633647).

The spelling of 12421226 in words is "twelve million, four hundred twenty-one thousand, two hundred twenty-six".