1221186 has 8 divisors (see below), whose sum is σ = 2442384. Its totient is φ = 407060.

The previous prime is 1221167. The next prime is 1221193. The reversal of 1221186 is 6811221.

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

1221186 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101760 + ... + 101771.

It is an arithmetic number, because the mean of its divisors is an integer number (305298).

2^1221186 is an apocalyptic number.

1221186 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221186 is a wasteful number, since it uses less digits than its factorization.

1221186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203536.

The product of its digits is 192, while the sum is 21.

The square root of 1221186 is about 1105.0728482774. The cubic root of 1221186 is about 106.8875868353.

The spelling of 1221186 in words is "one million, two hundred twenty-one thousand, one hundred eighty-six".