1220186 has 16 divisors (see below), whose sum is σ = 2052000. Its totient is φ = 539280.

The previous prime is 1220171. The next prime is 1220203. The reversal of 1220186 is 6810221.

It is an Ulam number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 65 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (128250).

2^1220186 is an apocalyptic number.

1220186 is a deficient number, since it is larger than the sum of its proper divisors (831814).

1220186 is a wasteful number, since it uses less digits than its factorization.

1220186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1220186 is about 1104.6202967536. The cubic root of 1220186 is about 106.8584029720.

The spelling of 1220186 in words is "one million, two hundred twenty thousand, one hundred eighty-six".