343665 has 24 divisors (see below), whose sum is σ = 681408. Its totient is φ = 156960.

The previous prime is 343661. The next prime is 343667. The reversal of 343665 is 566343.

It is not a de Polignac number, because 343665 - 2² = 343661 is a prime.

It is a d-powerful number, because it can be written as 3⁵ + 4⁶ + 6³ + 3¹⁰ + 6⁷ + 5³ .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 343665.

It is not an unprimeable number, because it can be changed into a prime (343661) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 231 + ... + 860.

It is an arithmetic number, because the mean of its divisors is an integer number (28392).

2³⁴³⁶⁶⁵ is an apocalyptic number.

343665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

343665 is a deficient number, since it is larger than the sum of its proper divisors (337743).

343665 is a wasteful number, since it uses less digits than its factorization.

343665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1106 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 343665 is about 586.2294772527. The cubic root of 343665 is about 70.0452088912.

The spelling of 343665 in words is "three hundred forty-three thousand, six hundred sixty-five".