12209426 has 4 divisors (see below), whose sum is σ = 18314142. Its totient is φ = 6104712.

The previous prime is 12209423. The next prime is 12209429. The reversal of 12209426 is 62490221.

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 (12209423) and next prime (12209429).

It can be written as a sum of positive squares in only one way, i.e., 6682225 + 5527201 = 2585^2 + 2351^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12209395 and 12209404.

It is not an unprimeable number, because it can be changed into a prime (12209423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3052355 + ... + 3052358.

Almost surely, 2^12209426 is an apocalyptic number.

12209426 is a deficient number, since it is larger than the sum of its proper divisors (6104716).

12209426 is an equidigital number, since it uses as much as digits as its factorization.

12209426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6104715.

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

The square root of 12209426 is about 3494.1989067596. The cubic root of 12209426 is about 230.2670244646.

Adding to 12209426 its reverse (62490221), we get a palindrome (74699647).

The spelling of 12209426 in words is "twelve million, two hundred nine thousand, four hundred twenty-six".