1812118 has 36 divisors (see below), whose sum is σ = 3535596. Its totient is φ = 688800.

The previous prime is 1812103. The next prime is 1812121. The reversal of 1812118 is 8112181.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 44178 + ... + 44218.

It is an arithmetic number, because the mean of its divisors is an integer number (98211).

2^1812118 is an apocalyptic number.

1812118 is a deficient number, since it is larger than the sum of its proper divisors (1723478).

1812118 is a wasteful number, since it uses less digits than its factorization.

1812118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 61 counting only the distinct ones).

The product of its digits is 128, while the sum is 22.

The square root of 1812118 is about 1346.1493230693. The cubic root of 1812118 is about 121.9164078452.

Multiplying 1812118 by its sum of digits (22), we get a square (39866596 = 6314²).

1812118 divided by its sum of digits (22) gives a square (82369 = 287²).

Adding to 1812118 its reverse (8112181), we get a palindrome (9924299).

The spelling of 1812118 in words is "one million, eight hundred twelve thousand, one hundred eighteen".