12409226 has 4 divisors (see below), whose sum is σ = 18613842. Its totient is φ = 6204612.

The previous prime is 12409219. The next prime is 12409231. The reversal of 12409226 is 62290421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62290421 = 83 ⋅750487.

It can be written as a sum of positive squares in only one way, i.e., 10233601 + 2175625 = 3199^2 + 1475^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12409195 and 12409204.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3102305 + ... + 3102308.

Almost surely, 2^12409226 is an apocalyptic number.

12409226 is a deficient number, since it is larger than the sum of its proper divisors (6204616).

12409226 is an equidigital number, since it uses as much as digits as its factorization.

12409226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6204615.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 12409226 is about 3522.6731327218. The cubic root of 12409226 is about 231.5162955189.

Adding to 12409226 its reverse (62290421), we get a palindrome (74699647).

The spelling of 12409226 in words is "twelve million, four hundred nine thousand, two hundred twenty-six".