11445281 has 4 divisors (see below), whose sum is σ = 11454612. Its totient is φ = 11435952.

The previous prime is 11445263. The next prime is 11445289. The reversal of 11445281 is 18254411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7102225 + 4343056 = 2665^2 + 2084^2 .

It is a cyclic number.

It is not a de Polignac number, because 11445281 - 2¹⁴ = 11428897 is a prime.

It is a super-2 number, since 2×11445281² = 261988914337922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11445281.

It is not an unprimeable number, because it can be changed into a prime (11445289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2486 + ... + 5391.

It is an arithmetic number, because the mean of its divisors is an integer number (2863653).

Almost surely, 2^11445281 is an apocalyptic number.

It is an amenable number.

11445281 is a deficient number, since it is larger than the sum of its proper divisors (9331).

11445281 is an equidigital number, since it uses as much as digits as its factorization.

11445281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9330.

The product of its digits is 1280, while the sum is 26.

The square root of 11445281 is about 3383.0874951736. The cubic root of 11445281 is about 225.3593008269.

Adding to 11445281 its reverse (18254411), we get a palindrome (29699692).

The spelling of 11445281 in words is "eleven million, four hundred forty-five thousand, two hundred eighty-one".