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1022020 = 225137373
BaseRepresentation
bin11111001100001000100
31220220221121
43321201010
5230201040
633523324
711454436
oct3714104
91826847
101022020
1163894a
12413544
1329a25c
141c8656
15152c4a
hexf9844

1022020 has 24 divisors (see below), whose sum is σ = 2167704. Its totient is φ = 404736.

The previous prime is 1022017. The next prime is 1022033. The reversal of 1022020 is 202201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 145924 + 876096 = 382^2 + 936^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1021994 and 1022012.

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, 2554 + ... + 2926.

It is an arithmetic number, because the mean of its divisors is an integer number (90321).

21022020 is an apocalyptic number.

1022020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022020 is an abundant number, since it is smaller than the sum of its proper divisors (1145684).

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

1022020 is a wasteful number, since it uses less digits than its factorization.

1022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 1022020 is about 1010.9500482220. The cubic root of 1022020 is about 100.7286773957.

Adding to 1022020 its reverse (202201), we get a palindrome (1224221).

The spelling of 1022020 in words is "one million, twenty-two thousand, twenty".

Divisors: 1 2 4 5 10 20 137 274 373 548 685 746 1370 1492 1865 2740 3730 7460 51101 102202 204404 255505 511010 1022020