11451281 has 6 divisors (see below), whose sum is σ = 12086082. Its totient is φ = 10848240.

The previous prime is 11451277. The next prime is 11451289. The reversal of 11451281 is 18215411.

It can be written as a sum of positive squares in only one way, i.e., 6677056 + 4774225 = 2584^2 + 2185^2 .

It is not a de Polignac number, because 11451281 - 2² = 11451277 is a prime.

It is a super-2 number, since 2×11451281² = 262263673081922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11451289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15500 + ... + 16221.

It is an arithmetic number, because the mean of its divisors is an integer number (2014347).

Almost surely, 2^11451281 is an apocalyptic number.

It is an amenable number.

11451281 is a deficient number, since it is larger than the sum of its proper divisors (634801).

11451281 is an equidigital number, since it uses as much as digits as its factorization.

11451281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31759 (or 31740 counting only the distinct ones).

The product of its digits is 320, while the sum is 23.

The square root of 11451281 is about 3383.9741429272. The cubic root of 11451281 is about 225.3986742476.

Adding to 11451281 its reverse (18215411), we get a palindrome (29666692).

The spelling of 11451281 in words is "eleven million, four hundred fifty-one thousand, two hundred eighty-one".