12291266 has 8 divisors (see below), whose sum is σ = 19855164. Its totient is φ = 5672880.

The previous prime is 12291259. The next prime is 12291277. The reversal of 12291266 is 66219221.

It is a happy number.

12291266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12285025 + 6241 = 3505^2 + 79^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236345 + ... + 236396.

Almost surely, 2^12291266 is an apocalyptic number.

12291266 is a deficient number, since it is larger than the sum of its proper divisors (7563898).

12291266 is a wasteful number, since it uses less digits than its factorization.

12291266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472756.

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

The square root of 12291266 is about 3505.8901865290. The cubic root of 12291266 is about 230.7803738266.

The spelling of 12291266 in words is "twelve million, two hundred ninety-one thousand, two hundred sixty-six".