11441681 has 4 divisors (see below), whose sum is σ = 11464164. Its totient is φ = 11419200.

The previous prime is 11441669. The next prime is 11441699. The reversal of 11441681 is 18614411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18614411 = 251 ⋅74161.

It can be written as a sum of positive squares in 2 ways, for example, as 6225025 + 5216656 = 2495^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 11441681 - 2¹⁰ = 11440657 is a prime.

It is a super-2 number, since 2×11441681² = 261824128211522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11441681.

It is not an unprimeable number, because it can be changed into a prime (11441611) 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, 10460 + ... + 11501.

It is an arithmetic number, because the mean of its divisors is an integer number (2866041).

Almost surely, 2^11441681 is an apocalyptic number.

It is an amenable number.

11441681 is a deficient number, since it is larger than the sum of its proper divisors (22483).

11441681 is an equidigital number, since it uses as much as digits as its factorization.

11441681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22482.

The product of its digits is 768, while the sum is 26.

The square root of 11441681 is about 3382.5553949640. Note that the first 3 decimals coincide. The cubic root of 11441681 is about 225.3356701690.

The spelling of 11441681 in words is "eleven million, four hundred forty-one thousand, six hundred eighty-one".