842305 has 16 divisors (see below), whose sum is σ = 1080720. Its totient is φ = 628992.

The previous prime is 842293. The next prime is 842311. The reversal of 842305 is 503248.

It can be written as a sum of positive squares in 8 ways, for example, as 3249 + 839056 = 57^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 842305 - 2⁹ = 841793 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5287 + ... + 5443.

It is an arithmetic number, because the mean of its divisors is an integer number (67545).

2⁸⁴²³⁰⁵ is an apocalyptic number.

It is an amenable number.

842305 is a deficient number, since it is larger than the sum of its proper divisors (238415).

842305 is a wasteful number, since it uses less digits than its factorization.

842305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228.

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

The square root of 842305 is about 917.7717581185. The cubic root of 842305 is about 94.4401046321.

The spelling of 842305 in words is "eight hundred forty-two thousand, three hundred five".