1218886 has 4 divisors (see below), whose sum is σ = 1828332. Its totient is φ = 609442.

The previous prime is 1218859. The next prime is 1218901. The reversal of 1218886 is 6888121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6888121 = 149 ⋅46229.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304720 + ... + 304723.

It is an arithmetic number, because the mean of its divisors is an integer number (457083).

2^1218886 is an apocalyptic number.

1218886 is a deficient number, since it is larger than the sum of its proper divisors (609446).

1218886 is an equidigital number, since it uses as much as digits as its factorization.

1218886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609445.

The product of its digits is 6144, while the sum is 34.

The square root of 1218886 is about 1104.0317024434. The cubic root of 1218886 is about 106.8204401021.

The spelling of 1218886 in words is "one million, two hundred eighteen thousand, eight hundred eighty-six".