305842 has 8 divisors (see below), whose sum is σ = 471276. Its totient is φ = 148752.

The previous prime is 305839. The next prime is 305849. The reversal of 305842 is 248503.

It can be written as a sum of positive squares in 2 ways, for example, as 269361 + 36481 = 519^2 + 191^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (305849) 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, 1993 + ... + 2140.

2³⁰⁵⁸⁴² is an apocalyptic number.

305842 is a deficient number, since it is larger than the sum of its proper divisors (165434).

305842 is a wasteful number, since it uses less digits than its factorization.

305842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 305842 is about 553.0298364465. The cubic root of 305842 is about 67.3750408748.

The spelling of 305842 in words is "three hundred five thousand, eight hundred forty-two".