304345 has 4 divisors (see below), whose sum is σ = 365220. Its totient is φ = 243472.

The previous prime is 304331. The next prime is 304349. The reversal of 304345 is 543403.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168921 + 135424 = 411^2 + 368^2 .

It is a cyclic number.

It is not a de Polignac number, because 304345 - 2⁷ = 304217 is a prime.

304345 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304349) 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, 30430 + ... + 30439.

It is an arithmetic number, because the mean of its divisors is an integer number (91305).

2³⁰⁴³⁴⁵ is an apocalyptic number.

It is an amenable number.

304345 is a deficient number, since it is larger than the sum of its proper divisors (60875).

304345 is an equidigital number, since it uses as much as digits as its factorization.

304345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60874.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 304345 is about 551.6747230026. The cubic root of 304345 is about 67.2649345180.

Adding to 304345 its reverse (543403), we get a palindrome (847748).

The spelling of 304345 in words is "three hundred four thousand, three hundred forty-five".