1218668 has 12 divisors (see below), whose sum is σ = 2326632. Its totient is φ = 553920.

The previous prime is 1218653. The next prime is 1218683. The reversal of 1218668 is 8668121.

1218668 is nontrivially palindromic in base 8.

It is an interprime number because it is at equal distance from previous prime (1218653) and next prime (1218683).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13805 + ... + 13892.

It is an arithmetic number, because the mean of its divisors is an integer number (193886).

2^1218668 is an apocalyptic number.

It is an amenable number.

1218668 is a deficient number, since it is larger than the sum of its proper divisors (1107964).

1218668 is a wasteful number, since it uses less digits than its factorization.

1218668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27712 (or 27710 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 1218668 is about 1103.9329689795. The cubic root of 1218668 is about 106.8140713784.

The spelling of 1218668 in words is "one million, two hundred eighteen thousand, six hundred sixty-eight".