11280881 has 2 divisors, whose sum is σ = 11280882. Its totient is φ = 11280880.

The previous prime is 11280817. The next prime is 11280883. The reversal of 11280881 is 18808211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6330256 + 4950625 = 2516^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 11280881 - 2⁶ = 11280817 is a prime.

It is a super-2 number, since 2×11280881² = 254516552272322, which contains 22 as substring.

Together with 11280883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11280883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5640440 + 5640441.

It is an arithmetic number, because the mean of its divisors is an integer number (5640441).

Almost surely, 2^11280881 is an apocalyptic number.

It is an amenable number.

11280881 is a deficient number, since it is larger than the sum of its proper divisors (1).

11280881 is an equidigital number, since it uses as much as digits as its factorization.

11280881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 11280881 is about 3358.7022791549. The cubic root of 11280881 is about 224.2750726266.

The spelling of 11280881 in words is "eleven million, two hundred eighty thousand, eight hundred eighty-one".