11281281 has 16 divisors (see below), whose sum is σ = 16573440. Its totient is φ = 6768720.

The previous prime is 11281271. The next prime is 11281289. The reversal of 11281281 is 18218211.

It is not a de Polignac number, because 11281281 - 2¹⁰ = 11280257 is a prime.

It is a super-2 number, since 2×11281281² = 254534602001922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11281289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1740 + ... + 5058.

It is an arithmetic number, because the mean of its divisors is an integer number (1035840).

Almost surely, 2^11281281 is an apocalyptic number.

11281281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11281281 is a deficient number, since it is larger than the sum of its proper divisors (5292159).

11281281 is a wasteful number, since it uses less digits than its factorization.

11281281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436.

The product of its digits is 256, while the sum is 24.

The square root of 11281281 is about 3358.7618254351. The cubic root of 11281281 is about 224.2777233938.

Adding to 11281281 its reverse (18218211), we get a palindrome (29499492).

The spelling of 11281281 in words is "eleven million, two hundred eighty-one thousand, two hundred eighty-one".