12681226 has 8 divisors (see below), whose sum is σ = 19060740. Its totient is φ = 6327648.

The previous prime is 12681223. The next prime is 12681233. The reversal of 12681226 is 62218621.

It can be written as a sum of positive squares in 2 ways, for example, as 11229201 + 1452025 = 3351^2 + 1205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12681194 and 12681203.

It is not an unprimeable number, because it can be changed into a prime (12681223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5211 + ... + 7246.

Almost surely, 2^12681226 is an apocalyptic number.

12681226 is a deficient number, since it is larger than the sum of its proper divisors (6379514).

12681226 is a wasteful number, since it uses less digits than its factorization.

12681226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12968.

The product of its digits is 2304, while the sum is 28.

The square root of 12681226 is about 3561.0709063426. The cubic root of 12681226 is about 233.1956334927.

Adding to 12681226 its reverse (62218621), we get a palindrome (74899847).

The spelling of 12681226 in words is "twelve million, six hundred eighty-one thousand, two hundred twenty-six".