1118866 has 20 divisors (see below), whose sum is σ = 1966302. Its totient is φ = 477456.

The previous prime is 1118863. The next prime is 1118867. The reversal of 1118866 is 6688111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1058841 + 60025 = 1029^2 + 245^2 .

It is a super-2 number, since 2×1118866² = 2503722251912, which contains 22 as substring.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1118861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4686 + ... + 4918.

2^1118866 is an apocalyptic number.

1118866 is a deficient number, since it is larger than the sum of its proper divisors (847436).

1118866 is an frugal number, since it uses more digits than its factorization.

1118866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 242 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 1118866 is about 1057.7646241012. The cubic root of 1118866 is about 103.8148208660.

The spelling of 1118866 in words is "one million, one hundred eighteen thousand, eight hundred sixty-six".