304705 has 8 divisors (see below), whose sum is σ = 369000. Its totient is φ = 241536.

The previous prime is 304687. The next prime is 304709. The reversal of 304705 is 507403.

It is a Cunningham number, because it is equal to 552²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 35344 + 269361 = 188^2 + 519^2 .

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 304705 - 2⁹ = 304193 is a prime.

304705 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (304709) by changing a digit.

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, 541 + ... + 949.

It is an arithmetic number, because the mean of its divisors is an integer number (46125).

2³⁰⁴⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

304705 is a deficient number, since it is larger than the sum of its proper divisors (64295).

304705 is a wasteful number, since it uses less digits than its factorization.

304705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 304705 is about 552.0009057964. Note that the first 3 decimals coincide. The cubic root of 304705 is about 67.2914459166.

The spelling of 304705 in words is "three hundred four thousand, seven hundred five".