345965 has 4 divisors (see below), whose sum is σ = 415164. Its totient is φ = 276768.

The previous prime is 345953. The next prime is 345979. The reversal of 345965 is 569543.

It is a happy number.

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 188356 + 157609 = 434^2 + 397^2 .

It is a cyclic number.

It is not a de Polignac number, because 345965 - 2¹⁰ = 344941 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 34592 + ... + 34601.

It is an arithmetic number, because the mean of its divisors is an integer number (103791).

2³⁴⁵⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

345965 is a deficient number, since it is larger than the sum of its proper divisors (69199).

345965 is an equidigital number, since it uses as much as digits as its factorization.

345965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69198.

The product of its digits is 16200, while the sum is 32.

The square root of 345965 is about 588.1878951492. The cubic root of 345965 is about 70.2011222673.

The spelling of 345965 in words is "three hundred forty-five thousand, nine hundred sixty-five".