1218843 has 6 divisors (see below), whose sum is σ = 1760564. Its totient is φ = 812556.

The previous prime is 1218829. The next prime is 1218853. The reversal of 1218843 is 3488121.

It is not a de Polignac number, because 1218843 - 2⁶ = 1218779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67705 + ... + 67722.

2^1218843 is an apocalyptic number.

1218843 is a deficient number, since it is larger than the sum of its proper divisors (541721).

1218843 is a wasteful number, since it uses less digits than its factorization.

1218843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135433 (or 135430 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1218843 is about 1104.0122281931. The cubic root of 1218843 is about 106.8191839460.

Subtracting from 1218843 its sum of digits (27), we obtain a square (1218816 = 1104²).

The spelling of 1218843 in words is "one million, two hundred eighteen thousand, eight hundred forty-three".