11291305 has 4 divisors (see below), whose sum is σ = 13549572. Its totient is φ = 9033040.

The previous prime is 11291297. The next prime is 11291311. The reversal of 11291305 is 50319211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5400976 + 5890329 = 2324^2 + 2427^2 .

It is not a de Polignac number, because 11291305 - 2³ = 11291297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1129126 + ... + 1129135.

It is an arithmetic number, because the mean of its divisors is an integer number (3387393).

Almost surely, 2^11291305 is an apocalyptic number.

It is an amenable number.

11291305 is a deficient number, since it is larger than the sum of its proper divisors (2258267).

11291305 is an equidigital number, since it uses as much as digits as its factorization.

11291305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258266.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 11291305 is about 3360.2537106594. The cubic root of 11291305 is about 224.3441311703.

The spelling of 11291305 in words is "eleven million, two hundred ninety-one thousand, three hundred five".