442443

442443 is a natural number. In base-10 notation it is the successor of 442442 and the predecessor of 442444. Its digits sum to 21.

In number theory terms, 442443 is odd and composite. It factors as 442443 = 3 × 147481. The number 147,481 is itself prime, making 442,443 a semiprime (the product of two primes). This simple factorization means that its divisibility by small primes is limited to 3, with the remaining cofactor being a prime.

Additionally, 442443 is divisible by 3 but not by 9 (since the digit sum is 21, which is not a multiple of 9). It is not a palindrome in decimal form (442443 reversed is 344244). Its binary representation, obtained by decomposition into powers of two, is 1101100000001001011 in base 2.

As a semiprime, 442443 serves as a straightforward example in introductory discussions of prime factorization and related concepts. Semiprimes are factors of interest in various fields, including cryptography, though 442443 itself is far too small for any real cryptographic use; modern RSA keys involve semiprimes composed of much larger primes.

In summary, 442443 is a non-prime, semiprime number with prime factors 3 and 147481, a decimal digit sum of 21, and a binary form of 1101100000001001011.