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BaseRepresentation
bin100101010011000111000
32022002112200
410222120320
5303102300
642110200
713250160
oct4523070
92262480
101222200
11765291
124ab360
1333a3c5
1423b5a0
15192200
hex12a638

1222200 has 144 divisors (see below), whose sum is σ = 4739280. Its totient is φ = 276480.

The previous prime is 1222187. The next prime is 1222219. The reversal of 1222200 is 22221.

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12552 + ... + 12648.

21222200 is an apocalyptic number.

1222200 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 1222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2369640).

1222200 is an abundant number, since it is smaller than the sum of its proper divisors (3517080).

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

1222200 is a wasteful number, since it uses less digits than its factorization.

1222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 114 counting only the distinct ones).

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

The square root of 1222200 is about 1105.5315463613. The cubic root of 1222200 is about 106.9171630092.

Adding to 1222200 its reverse (22221), we get a palindrome (1244421).

The spelling of 1222200 in words is "one million, two hundred twenty-two thousand, two hundred".