11181243 has 16 divisors (see below), whose sum is σ = 15687936. Its totient is φ = 7069920.

The previous prime is 11181241. The next prime is 11181263. The reversal of 11181243 is 34218111.

It is a happy number.

It is not a de Polignac number, because 11181243 - 2¹ = 11181241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11181241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8421 + ... + 9657.

It is an arithmetic number, because the mean of its divisors is an integer number (980496).

Almost surely, 2^11181243 is an apocalyptic number.

11181243 is a deficient number, since it is larger than the sum of its proper divisors (4506693).

11181243 is a wasteful number, since it uses less digits than its factorization.

11181243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394.

The product of its digits is 192, while the sum is 21.

The square root of 11181243 is about 3343.8365689728. The cubic root of 11181243 is about 223.6128183379.

Adding to 11181243 its reverse (34218111), we get a palindrome (45399354).

The spelling of 11181243 in words is "eleven million, one hundred eighty-one thousand, two hundred forty-three".