Search a number
-
+
1223165 = 5244633
BaseRepresentation
bin100101010100111111101
32022010212102
410222213331
5303120130
642114445
713253036
oct4524775
92263772
101223165
11765a89
124aba25
1333a988
1423ba8d
15192645
hex12a9fd

1223165 has 4 divisors (see below), whose sum is σ = 1467804. Its totient is φ = 978528.

The previous prime is 1223161. The next prime is 1223177. The reversal of 1223165 is 5613221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5613221 = 15735753.

It can be written as a sum of positive squares in 2 ways, for example, as 217156 + 1006009 = 466^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223165 - 22 = 1223161 is a prime.

It is a super-2 number, since 2×12231652 = 2992265234450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122312 + ... + 122321.

It is an arithmetic number, because the mean of its divisors is an integer number (366951).

21223165 is an apocalyptic number.

It is an amenable number.

1223165 is a deficient number, since it is larger than the sum of its proper divisors (244639).

1223165 is an equidigital number, since it uses as much as digits as its factorization.

1223165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244638.

The product of its digits is 360, while the sum is 20.

The square root of 1223165 is about 1105.9679018850. The cubic root of 1223165 is about 106.9452947716.

Adding to 1223165 its reverse (5613221), we get a palindrome (6836386).

The spelling of 1223165 in words is "one million, two hundred twenty-three thousand, one hundred sixty-five".

Divisors: 1 5 244633 1223165