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1200420 = 223551319
BaseRepresentation
bin100100101000100100100
32020222200000
410211010210
5301403140
641421300
713126524
oct4450444
92228600
101200420
1174a991
1249a830
13330510
14233684
1518aa30
hex125124

1200420 has 144 divisors (see below), whose sum is σ = 4280640. Its totient is φ = 279936.

The previous prime is 1200403. The next prime is 1200443. The reversal of 1200420 is 240021.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63171 + ... + 63189.

21200420 is an apocalyptic number.

1200420 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 1200420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2140320).

1200420 is an abundant number, since it is smaller than the sum of its proper divisors (3080220).

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

1200420 is a wasteful number, since it uses less digits than its factorization.

1200420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 42 counting only the distinct ones).

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

The square root of 1200420 is about 1095.6368011344. The cubic root of 1200420 is about 106.2782531555.

Adding to 1200420 its reverse (240021), we get a palindrome (1440441).

The spelling of 1200420 in words is "one million, two hundred thousand, four hundred twenty".

Divisors: 1 2 3 4 5 6 9 10 12 13 15 18 19 20 26 27 30 36 38 39 45 52 54 57 60 65 76 78 81 90 95 108 114 117 130 135 156 162 171 180 190 195 228 234 243 247 260 270 285 324 342 351 380 390 405 468 486 494 513 540 570 585 684 702 741 780 810 855 972 988 1026 1053 1140 1170 1215 1235 1404 1482 1539 1620 1710 1755 2052 2106 2223 2340 2430 2470 2565 2964 3078 3159 3420 3510 3705 4212 4446 4617 4860 4940 5130 5265 6156 6318 6669 7020 7410 7695 8892 9234 10260 10530 11115 12636 13338 14820 15390 15795 18468 20007 21060 22230 23085 26676 30780 31590 33345 40014 44460 46170 60021 63180 66690 80028 92340 100035 120042 133380 200070 240084 300105 400140 600210 1200420