11085781 has 8 divisors (see below), whose sum is σ = 12735360. Its totient is φ = 9452688.

The previous prime is 11085769. The next prime is 11085791. The reversal of 11085781 is 18758011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11085781 - 2¹¹ = 11083733 is a prime.

It is a super-2 number, since 2×11085781² = 245789080759922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11085791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2641 + ... + 5398.

It is an arithmetic number, because the mean of its divisors is an integer number (1591920).

Almost surely, 2^11085781 is an apocalyptic number.

It is an amenable number.

11085781 is a deficient number, since it is larger than the sum of its proper divisors (1649579).

11085781 is an equidigital number, since it uses as much as digits as its factorization.

11085781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8243.

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 11085781 is about 3329.5316487458. The cubic root of 11085781 is about 222.9746195652.

It can be divided in two parts, 1108 and 5781, that added together give a square (6889 = 83²).

The spelling of 11085781 in words is "eleven million, eighty-five thousand, seven hundred eighty-one".