1220850 has 36 divisors (see below), whose sum is σ = 3281226. Its totient is φ = 325440.

The previous prime is 1220839. The next prime is 1220893. The reversal of 1220850 is 580221.

It can be written as a sum of positive squares in 3 ways, for example, as 1172889 + 47961 = 1083^2 + 219^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 907 + ... + 1806.

2^1220850 is an apocalyptic number.

1220850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220850 is an abundant number, since it is smaller than the sum of its proper divisors (2060376).

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

1220850 is a wasteful number, since it uses less digits than its factorization.

1220850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731 (or 2723 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1220850 is about 1104.9208116422. The cubic root of 1220850 is about 106.8777828351.

The spelling of 1220850 in words is "one million, two hundred twenty thousand, eight hundred fifty".