11286581 has 2 divisors, whose sum is σ = 11286582. Its totient is φ = 11286580.

The previous prime is 11286577. The next prime is 11286599. The reversal of 11286581 is 18568211.

11286581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7789681 + 3496900 = 2791^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 11286581 - 2² = 11286577 is a prime.

It is a super-2 number, since 2×11286581² = 254773821339122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11226581) 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 as a sum of consecutive naturals, namely, 5643290 + 5643291.

It is an arithmetic number, because the mean of its divisors is an integer number (5643291).

Almost surely, 2^11286581 is an apocalyptic number.

It is an amenable number.

11286581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11286581 is an equidigital number, since it uses as much as digits as its factorization.

11286581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 32.

The square root of 11286581 is about 3359.5507140092. The cubic root of 11286581 is about 224.3128401456.

The spelling of 11286581 in words is "eleven million, two hundred eighty-six thousand, five hundred eighty-one".