1218166 has 8 divisors (see below), whose sum is σ = 1923480. Its totient is φ = 577008.

The previous prime is 1218157. The next prime is 1218167. The reversal of 1218166 is 6618121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1218166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15991 + ... + 16066.

It is an arithmetic number, because the mean of its divisors is an integer number (240435).

2^1218166 is an apocalyptic number.

1218166 is a deficient number, since it is larger than the sum of its proper divisors (705314).

1218166 is a wasteful number, since it uses less digits than its factorization.

1218166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32078.

The product of its digits is 576, while the sum is 25.

The square root of 1218166 is about 1103.7055766825. The cubic root of 1218166 is about 106.7994028966.

The spelling of 1218166 in words is "one million, two hundred eighteen thousand, one hundred sixty-six".