12661226 has 16 divisors (see below), whose sum is σ = 20804040. Its totient is φ = 5752320.

The previous prime is 12661213. The next prime is 12661241. The reversal of 12661226 is 62216621.

It can be written as a sum of positive squares in 4 ways, for example, as 11895601 + 765625 = 3449^2 + 875^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12661195 and 12661204.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 5435 + ... + 7406.

Almost surely, 2^12661226 is an apocalyptic number.

12661226 is a deficient number, since it is larger than the sum of its proper divisors (8142814).

12661226 is a wasteful number, since it uses less digits than its factorization.

12661226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12889.

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

The square root of 12661226 is about 3558.2616542351. The cubic root of 12661226 is about 233.0729753551.

Adding to 12661226 its reverse (62216621), we get a palindrome (74877847).

The spelling of 12661226 in words is "twelve million, six hundred sixty-one thousand, two hundred twenty-six".