128223 has 10 divisors (see below), whose sum is σ = 191664. Its totient is φ = 85428.
The previous prime is 128221. The next prime is 128237. The reversal of 128223 is 322821.
It is a happy number.
It is not a de Polignac number, because 128223 - 21 = 128221 is a prime.
It is a super-2 number, since 2×1282232 = 32882275458, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 128196 and 128205.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (128221) 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 9 ways as a sum of consecutive naturals, for example, 711 + ... + 872.
2128223 is an apocalyptic number.
128223 is a deficient number, since it is larger than the sum of its proper divisors (63441).
128223 is an equidigital number, since it uses as much as digits as its factorization.
128223 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1595 (or 1586 counting only the distinct ones).
The product of its digits is 192, while the sum is 18.
The square root of 128223 is about 358.0823927534. The cubic root of 128223 is about 50.4260919321.
It can be divided in two parts, 128 and 223, that added together give a triangular number (351 = T26).
The spelling of 128223 in words is "one hundred twenty-eight thousand, two hundred twenty-three".
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