206465 has 16 divisors (see below), whose sum is σ = 300672. Its totient is φ = 132864.

The previous prime is 206461. The next prime is 206467. The reversal of 206465 is 564602.

It is a cyclic number.

It is not a de Polignac number, because 206465 - 2² = 206461 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 206465.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206465.

It is not an unprimeable number, because it can be changed into a prime (206461) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 422 + ... + 768.

It is an arithmetic number, because the mean of its divisors is an integer number (18792).

2²⁰⁶⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

206465 is a deficient number, since it is larger than the sum of its proper divisors (94207).

206465 is a wasteful number, since it uses less digits than its factorization.

206465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 206465 is about 454.3841986689. The cubic root of 206465 is about 59.1038103443.

The spelling of 206465 in words is "two hundred six thousand, four hundred sixty-five".