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1222566 = 23203761
BaseRepresentation
bin100101010011110100110
32022010001020
410222132212
5303110231
642112010
713251222
oct4523646
92263036
101222566
11765594
124ab606
1333a617
1423b782
15192396
hex12a7a6

1222566 has 8 divisors (see below), whose sum is σ = 2445144. Its totient is φ = 407520.

The previous prime is 1222561. The next prime is 1222567. The reversal of 1222566 is 6652221.

It is a sphenic number, since it is the product of 3 distinct primes.

1222566 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a plaindrome in base 10.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101875 + ... + 101886.

It is an arithmetic number, because the mean of its divisors is an integer number (305643).

21222566 is an apocalyptic number.

1222566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1222566 is a wasteful number, since it uses less digits than its factorization.

1222566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203766.

The product of its digits is 1440, while the sum is 24.

The square root of 1222566 is about 1105.6970652037. The cubic root of 1222566 is about 106.9278344149.

Adding to 1222566 its reverse (6652221), we get a palindrome (7874787).

It can be divided in two parts, 12 and 22566, that added together give a triangular number (22578 = T212).

The spelling of 1222566 in words is "one million, two hundred twenty-two thousand, five hundred sixty-six".

Divisors: 1 2 3 6 203761 407522 611283 1222566