342805 has 16 divisors (see below), whose sum is σ = 451440. Its totient is φ = 248832.

The previous prime is 342803. The next prime is 342821. The reversal of 342805 is 508243.

It can be written as a sum of positive squares in 8 ways, for example, as 53361 + 289444 = 231^2 + 538^2 .

It is a 5-Lehmer number, since φ(342805) divides (342805-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 342805 - 2¹ = 342803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3091 + ... + 3199.

It is an arithmetic number, because the mean of its divisors is an integer number (28215).

2³⁴²⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

342805 is a deficient number, since it is larger than the sum of its proper divisors (108635).

342805 is a wasteful number, since it uses less digits than its factorization.

342805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168.

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

The square root of 342805 is about 585.4955166353. The cubic root of 342805 is about 69.9867321792.

The spelling of 342805 in words is "three hundred forty-two thousand, eight hundred five".