1113218 has 4 divisors (see below), whose sum is σ = 1669830. Its totient is φ = 556608.

The previous prime is 1113199. The next prime is 1113221. The reversal of 1113218 is 8123111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8123111 = 1297 ⋅6263.

It can be written as a sum of positive squares in only one way, i.e., 744769 + 368449 = 863^2 + 607^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1113196 and 1113205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278303 + ... + 278306.

2^1113218 is an apocalyptic number.

1113218 is a deficient number, since it is larger than the sum of its proper divisors (556612).

1113218 is an equidigital number, since it uses as much as digits as its factorization.

1113218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556611.

The product of its digits is 48, while the sum is 17.

The square root of 1113218 is about 1055.0914652294. The cubic root of 1113218 is about 103.6398414662.

Adding to 1113218 its reverse (8123111), we get a palindrome (9236329).

It can be divided in two parts, 1113 and 218, that added together give a palindrome (1331).

The spelling of 1113218 in words is "one million, one hundred thirteen thousand, two hundred eighteen".