11281081 has 16 divisors (see below), whose sum is σ = 13948416. Its totient is φ = 8902656.

The previous prime is 11281073. The next prime is 11281091. The reversal of 11281081 is 18018211.

It is not a de Polignac number, because 11281081 - 2³ = 11281073 is a prime.

It is a super-2 number, since 2×11281081² = 254525577057122, which contains 22 as substring.

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 (11281001) 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 15 ways as a sum of consecutive naturals, for example, 4585 + ... + 6601.

It is an arithmetic number, because the mean of its divisors is an integer number (871776).

Almost surely, 2^11281081 is an apocalyptic number.

It is an amenable number.

11281081 is a deficient number, since it is larger than the sum of its proper divisors (2667335).

11281081 is a wasteful number, since it uses less digits than its factorization.

11281081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 11281081 is about 3358.7320524269. The cubic root of 11281081 is about 224.2763980181.

Adding to 11281081 its reverse (18018211), we get a palindrome (29299292).

It can be divided in two parts, 1128 and 1081, that added together give a square (2209 = 47²).

The spelling of 11281081 in words is "eleven million, two hundred eighty-one thousand, eighty-one".