340565 has 4 divisors (see below), whose sum is σ = 408684. Its totient is φ = 272448.

The previous prime is 340559. The next prime is 340573. The reversal of 340565 is 565043.

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 108241 + 232324 = 329^2 + 482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340565 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 340565.

It is a congruent number.

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, 34052 + ... + 34061.

It is an arithmetic number, because the mean of its divisors is an integer number (102171).

2³⁴⁰⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

340565 is a deficient number, since it is larger than the sum of its proper divisors (68119).

340565 is an equidigital number, since it uses as much as digits as its factorization.

340565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68118.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 340565 is about 583.5794718802. The cubic root of 340565 is about 69.8339602070.

The spelling of 340565 in words is "three hundred forty thousand, five hundred sixty-five".