395665 has 4 divisors (see below), whose sum is σ = 474804. Its totient is φ = 316528.

The previous prime is 395657. The next prime is 395671. The reversal of 395665 is 566593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566593 = 17 ⋅33329.

It can be written as a sum of positive squares in 2 ways, for example, as 263169 + 132496 = 513^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 395665 - 2³ = 395657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 395665.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 39562 + ... + 39571.

It is an arithmetic number, because the mean of its divisors is an integer number (118701).

2³⁹⁵⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

395665 is a deficient number, since it is larger than the sum of its proper divisors (79139).

395665 is an equidigital number, since it uses as much as digits as its factorization.

395665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79138.

The product of its digits is 24300, while the sum is 34.

The square root of 395665 is about 629.0190776121. The cubic root of 395665 is about 73.4134913218.

The spelling of 395665 in words is "three hundred ninety-five thousand, six hundred sixty-five".