12420226 has 24 divisors (see below), whose sum is σ = 23341500. Its totient is φ = 4912992.

The previous prime is 12420211. The next prime is 12420227. The reversal of 12420226 is 62202421.

It can be written as a sum of positive squares in 2 ways, for example, as 10595025 + 1825201 = 3255^2 + 1351^2 .

It is not an unprimeable number, because it can be changed into a prime (12420227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3601 + ... + 6148.

Almost surely, 2^12420226 is an apocalyptic number.

12420226 is a deficient number, since it is larger than the sum of its proper divisors (10921274).

12420226 is a wasteful number, since it uses less digits than its factorization.

12420226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9778 (or 9771 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 12420226 is about 3524.2341011913. The cubic root of 12420226 is about 231.5846835374.

Adding to 12420226 its reverse (62202421), we get a palindrome (74622647).

The spelling of 12420226 in words is "twelve million, four hundred twenty thousand, two hundred twenty-six".