305345 has 8 divisors (see below), whose sum is σ = 369576. Its totient is φ = 242176.

The previous prime is 305339. The next prime is 305351. The reversal of 305345 is 543503.

It is an interprime number because it is at equal distance from previous prime (305339) and next prime (305351).

It can be written as a sum of positive squares in 4 ways, for example, as 73984 + 231361 = 272^2 + 481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 305345 - 2⁴ = 305329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689 + ... + 1041.

It is an arithmetic number, because the mean of its divisors is an integer number (46197).

2³⁰⁵³⁴⁵ is an apocalyptic number.

It is an amenable number.

305345 is a deficient number, since it is larger than the sum of its proper divisors (64231).

305345 is a wasteful number, since it uses less digits than its factorization.

305345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531.

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 305345 is about 552.5803109051. The cubic root of 305345 is about 67.3385257789.

Adding to 305345 its reverse (543503), we get a palindrome (848848).

The spelling of 305345 in words is "three hundred five thousand, three hundred forty-five".