11391266 has 4 divisors (see below), whose sum is σ = 17086902. Its totient is φ = 5695632.

The previous prime is 11391253. The next prime is 11391269. The reversal of 11391266 is 66219311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66219311 = 5077 ⋅13043.

It can be written as a sum of positive squares in only one way, i.e., 7102225 + 4289041 = 2665^2 + 2071^2 .

It is not an unprimeable number, because it can be changed into a prime (11391269) 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 as a sum of consecutive naturals, namely, 2847815 + ... + 2847818.

Almost surely, 2^11391266 is an apocalyptic number.

11391266 is a deficient number, since it is larger than the sum of its proper divisors (5695636).

11391266 is an equidigital number, since it uses as much as digits as its factorization.

11391266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5695635.

The product of its digits is 1944, while the sum is 29.

The square root of 11391266 is about 3375.0949616270. The cubic root of 11391266 is about 225.0042204970.

The spelling of 11391266 in words is "eleven million, three hundred ninety-one thousand, two hundred sixty-six".