205345 has 8 divisors (see below), whose sum is σ = 281664. Its totient is φ = 140784.

The previous prime is 205339. The next prime is 205357. The reversal of 205345 is 543502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-205345 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2899 + ... + 2968.

It is an arithmetic number, because the mean of its divisors is an integer number (35208).

2²⁰⁵³⁴⁵ is an apocalyptic number.

It is an amenable number.

205345 is a deficient number, since it is larger than the sum of its proper divisors (76319).

205345 is an equidigital number, since it uses as much as digits as its factorization.

205345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 205345 is about 453.1500855125. The cubic root of 205345 is about 58.9967440509.

Adding to 205345 its reverse (543502), we get a palindrome (748847).

The spelling of 205345 in words is "two hundred five thousand, three hundred forty-five".