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1222120 = 23530553
BaseRepresentation
bin100101010010111101000
32022002102201
410222113220
5303101440
642105544
713250014
oct4522750
92262381
101222120
11765219
124ab2b4
1333a363
1423b544
1519219a
hex12a5e8

1222120 has 16 divisors (see below), whose sum is σ = 2749860. Its totient is φ = 488832.

The previous prime is 1222097. The next prime is 1222129. The reversal of 1222120 is 212221.

It can be written as a sum of positive squares in 2 ways, for example, as 1153476 + 68644 = 1074^2 + 262^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1222097 and 1222106.

It is not an unprimeable number, because it can be changed into a prime (1222129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15237 + ... + 15316.

21222120 is an apocalyptic number.

1222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222120 is an abundant number, since it is smaller than the sum of its proper divisors (1527740).

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

1222120 is a wasteful number, since it uses less digits than its factorization.

1222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30564 (or 30560 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1222120 is about 1105.4953640789. The cubic root of 1222120 is about 106.9148301778.

Adding to 1222120 its reverse (212221), we get a palindrome (1434341).

The spelling of 1222120 in words is "one million, two hundred twenty-two thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 30553 61106 122212 152765 244424 305530 611060 1222120