12921266 has 8 divisors (see below), whose sum is σ = 19444764. Its totient is φ = 6439680.

The previous prime is 12921263. The next prime is 12921277. The reversal of 12921266 is 66212921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9480241 + 3441025 = 3079^2 + 1855^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12921263) 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 in 3 ways as a sum of consecutive naturals, for example, 9695 + ... + 10946.

Almost surely, 2^12921266 is an apocalyptic number.

12921266 is a deficient number, since it is larger than the sum of its proper divisors (6523498).

12921266 is a wasteful number, since it uses less digits than its factorization.

12921266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20956.

The product of its digits is 2592, while the sum is 29.

The square root of 12921266 is about 3594.6162521193. The cubic root of 12921266 is about 234.6578149460.

The spelling of 12921266 in words is "twelve million, nine hundred twenty-one thousand, two hundred sixty-six".