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BaseRepresentation
bin10011000110
31200021
4103012
514342
65354
73364
oct2306
91607
101222
11a11
1285a
13730
14634
15567
hex4c6

1222 has 8 divisors (see below), whose sum is σ = 2016. Its totient is φ = 552.

The previous prime is 1217. The next prime is 1223. The reversal of 1222 is 2221.

It is a happy number.

1222 is nontrivially palindromic in base 3.

1222 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

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

It is a nude number because it is divisible by every one of its digits.

1222 is a modest number, since divided by 22 gives 12 as remainder.

It is a plaindrome in base 10 and base 15.

It is a nialpdrome in base 11 and base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223) by changing a digit.

1222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3 + ... + 49.

It is an arithmetic number, because the mean of its divisors is an integer number (252).

1222 is a deficient number, since it is larger than the sum of its proper divisors (794).

1222 is a wasteful number, since it uses less digits than its factorization.

1222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62.

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

The square root of 1222 is about 34.9571165859. The cubic root of 1222 is about 10.6911330740.

Adding to 1222 its reverse (2221), we get a palindrome (3443).

Subtracting 1222 from its reverse (2221), we obtain a palindrome (999).

The spelling of 1222 in words is "one thousand, two hundred twenty-two", and thus it is an iban number.

Divisors: 1 2 13 26 47 94 611 1222