1022220 has 60 divisors (see below), whose sum is σ = 3211824. Its totient is φ = 272160.

The previous prime is 1022209. The next prime is 1022237. The reversal of 1022220 is 222201.

1022220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1305 + ... + 1935.

2^1022220 is an apocalyptic number.

1022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1605912).

1022220 is an abundant number, since it is smaller than the sum of its proper divisors (2189604).

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

1022220 is a wasteful number, since it uses less digits than its factorization.

1022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1022220 is about 1011.0489602388. The cubic root of 1022220 is about 100.7352475285.

Adding to 1022220 its reverse (222201), we get a palindrome (1244421).

The spelling of 1022220 in words is "one million, twenty-two thousand, two hundred twenty".