1811118 has 16 divisors (see below), whose sum is σ = 3813120. Its totient is φ = 571896.

The previous prime is 1811107. The next prime is 1811119. The reversal of 1811118 is 8111181.

It is a happy number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1811094 and 1811103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1811119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7830 + ... + 8057.

It is an arithmetic number, because the mean of its divisors is an integer number (238320).

2^1811118 is an apocalyptic number.

1811118 is an abundant number, since it is smaller than the sum of its proper divisors (2002002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1811118 is a wasteful number, since it uses less digits than its factorization.

1811118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15911.

The product of its digits is 64, while the sum is 21.

The square root of 1811118 is about 1345.7778419932. Note that the first 3 decimals coincide. The cubic root of 1811118 is about 121.8939775839.

Adding to 1811118 its reverse (8111181), we get a palindrome (9922299).

The spelling of 1811118 in words is "one million, eight hundred eleven thousand, one hundred eighteen".