1220844 has 12 divisors (see below), whose sum is σ = 2848664. Its totient is φ = 406944.

The previous prime is 1220839. The next prime is 1220893. The reversal of 1220844 is 4480221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1220844.

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, 50857 + ... + 50880.

2^1220844 is an apocalyptic number.

It is an amenable number.

1220844 is an abundant number, since it is smaller than the sum of its proper divisors (1627820).

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

1220844 is a wasteful number, since it uses less digits than its factorization.

1220844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101744 (or 101742 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1220844 is about 1104.9180965121. The cubic root of 1220844 is about 106.8776077473.

The spelling of 1220844 in words is "one million, two hundred twenty thousand, eight hundred forty-four".