11181065 has 24 divisors (see below), whose sum is σ = 15956352. Its totient is φ = 7496160.

The previous prime is 11181061. The next prime is 11181089. The reversal of 11181065 is 56018111.

It is a happy number.

It is not a de Polignac number, because 11181065 - 2² = 11181061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11181065.

It is not an unprimeable number, because it can be changed into a prime (11181061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11030 + ... + 12000.

It is an arithmetic number, because the mean of its divisors is an integer number (664848).

Almost surely, 2^11181065 is an apocalyptic number.

It is an amenable number.

11181065 is a deficient number, since it is larger than the sum of its proper divisors (4775287).

11181065 is an equidigital number, since it uses as much as digits as its factorization.

11181065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 11181065 is about 3343.8099527336. The cubic root of 11181065 is about 223.6116317288.

Adding to 11181065 its reverse (56018111), we get a palindrome (67199176).

It can be divided in two parts, 1118106 and 5, that added together give a palindrome (1118111).

The spelling of 11181065 in words is "eleven million, one hundred eighty-one thousand, sixty-five".