345565 has 16 divisors (see below), whose sum is σ = 464256. Its totient is φ = 244800.

The previous prime is 345551. The next prime is 345571. The reversal of 345565 is 565543.

It is not a de Polignac number, because 345565 - 2⁵ = 345533 is a prime.

It is a Duffinian number.

Its product of digits (9000) is a multiple of the sum of its prime divisors (180).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3304 + ... + 3406.

It is an arithmetic number, because the mean of its divisors is an integer number (29016).

2³⁴⁵⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

345565 is a deficient number, since it is larger than the sum of its proper divisors (118691).

345565 is a wasteful number, since it uses less digits than its factorization.

345565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180.

The product of its digits is 9000, while the sum is 28.

The square root of 345565 is about 587.8477694097. The cubic root of 345565 is about 70.1740566413.

The spelling of 345565 in words is "three hundred forty-five thousand, five hundred sixty-five".