11281113 has 10 divisors (see below), whose sum is σ = 16852154. Its totient is φ = 7520688.

The previous prime is 11281097. The next prime is 11281133. The reversal of 11281113 is 31118211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11269449 + 11664 = 3357^2 + 108^2 .

It is not a de Polignac number, because 11281113 - 2⁴ = 11281097 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11281133) 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 9 ways as a sum of consecutive naturals, for example, 69556 + ... + 69717.

Almost surely, 2^11281113 is an apocalyptic number.

It is an amenable number.

11281113 is a deficient number, since it is larger than the sum of its proper divisors (5571041).

11281113 is an equidigital number, since it uses as much as digits as its factorization.

11281113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139285 (or 139276 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

The square root of 11281113 is about 3358.7368161260. The cubic root of 11281113 is about 224.2766100792.

Adding to 11281113 its reverse (31118211), we get a palindrome (42399324).

It can be divided in two parts, 112 and 81113, that added together give a square (81225 = 285²).

The spelling of 11281113 in words is "eleven million, two hundred eighty-one thousand, one hundred thirteen".