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1222560 = 25335283
BaseRepresentation
bin100101010011110100000
32022010001000
410222132200
5303110220
642112000
713251213
oct4523640
92263030
101222560
11765589
124ab600
1333a611
1423b77a
15192390
hex12a7a0

1222560 has 96 divisors (see below), whose sum is σ = 4294080. Its totient is φ = 324864.

The previous prime is 1222537. The next prime is 1222561. The reversal of 1222560 is 652221.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is not an unprimeable number, because it can be changed into a prime (1222561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4179 + ... + 4461.

It is an arithmetic number, because the mean of its divisors is an integer number (44730).

21222560 is an apocalyptic number.

1222560 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 1222560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2147040).

1222560 is an abundant number, since it is smaller than the sum of its proper divisors (3071520).

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

1222560 is a wasteful number, since it uses less digits than its factorization.

1222560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1222560 is about 1105.6943519798. The cubic root of 1222560 is about 106.9276594910.

Adding to 1222560 its reverse (652221), we get a palindrome (1874781).

The spelling of 1222560 in words is "one million, two hundred twenty-two thousand, five hundred sixty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 72 80 90 96 108 120 135 144 160 180 216 240 270 283 288 360 432 480 540 566 720 849 864 1080 1132 1415 1440 1698 2160 2264 2547 2830 3396 4245 4320 4528 5094 5660 6792 7641 8490 9056 10188 11320 12735 13584 15282 16980 20376 22640 25470 27168 30564 33960 38205 40752 45280 50940 61128 67920 76410 81504 101880 122256 135840 152820 203760 244512 305640 407520 611280 1222560