342905 has 4 divisors (see below), whose sum is σ = 411492. Its totient is φ = 274320.

The previous prime is 342899. The next prime is 342929. The reversal of 342905 is 509243.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99856 + 243049 = 316^2 + 493^2 .

It is not a de Polignac number, because 342905 - 2⁴ = 342889 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 342905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34286 + ... + 34295.

It is an arithmetic number, because the mean of its divisors is an integer number (102873).

2³⁴²⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

342905 is a deficient number, since it is larger than the sum of its proper divisors (68587).

342905 is an equidigital number, since it uses as much as digits as its factorization.

342905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68586.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 342905 is about 585.5809081587. The cubic root of 342905 is about 69.9935368182.

The spelling of 342905 in words is "three hundred forty-two thousand, nine hundred five".