304243 has 4 divisors (see below), whose sum is σ = 305440. Its totient is φ = 303048.

The previous prime is 304223. The next prime is 304253. The reversal of 304243 is 342403.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 342403 = 29 ⋅11807.

It is a cyclic number.

It is not a de Polignac number, because 304243 - 2⁵ = 304211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (304223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48 + ... + 781.

It is an arithmetic number, because the mean of its divisors is an integer number (76360).

2³⁰⁴²⁴³ is an apocalyptic number.

304243 is a deficient number, since it is larger than the sum of its proper divisors (1197).

304243 is an equidigital number, since it uses as much as digits as its factorization.

304243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 304243 is about 551.5822694757. The cubic root of 304243 is about 67.2574191545.

Adding to 304243 its reverse (342403), we get a palindrome (646646).

The spelling of 304243 in words is "three hundred four thousand, two hundred forty-three", and thus it is an iban number.