1000220 has 24 divisors (see below), whose sum is σ = 2262624. Its totient is φ = 369216.

The previous prime is 1000213. The next prime is 1000231. The reversal of 1000220 is 220001.

1000220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an Ulam number.

1000220 is a modest number, since divided by 220 gives 100 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1664 + ... + 2183.

It is an arithmetic number, because the mean of its divisors is an integer number (94276).

2^1000220 is an apocalyptic number.

1000220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000220 is an abundant number, since it is smaller than the sum of its proper divisors (1262404).

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

1000220 is a wasteful number, since it uses less digits than its factorization.

1000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869 (or 3867 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 1000220 is about 1000.1099939507. The cubic root of 1000220 is about 100.0073327956.

Adding to 1000220 its reverse (220001), we get a palindrome (1220221).

The spelling of 1000220 in words is "one million, two hundred twenty", and thus it is an aban number.