12991466 has 8 divisors (see below), whose sum is σ = 19855044. Its totient is φ = 6373120.

The previous prime is 12991457. The next prime is 12991487. The reversal of 12991466 is 66419921.

It can be written as a sum of positive squares in 2 ways, for example, as 11703241 + 1288225 = 3421^2 + 1135^2 .

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, 61175 + ... + 61386.

Almost surely, 2^12991466 is an apocalyptic number.

12991466 is a deficient number, since it is larger than the sum of its proper divisors (6863578).

12991466 is a wasteful number, since it uses less digits than its factorization.

12991466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122616.

The product of its digits is 23328, while the sum is 38.

The square root of 12991466 is about 3604.3676283087. The cubic root of 12991466 is about 235.0820054830.

The spelling of 12991466 in words is "twelve million, nine hundred ninety-one thousand, four hundred sixty-six".