345205 has 12 divisors (see below), whose sum is σ = 482220. Its totient is φ = 236544.

The previous prime is 345193. The next prime is 345221. The reversal of 345205 is 502543.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47089 + 298116 = 217^2 + 546^2 .

It is not a de Polignac number, because 345205 - 2⁹ = 344693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460 + ... + 949.

It is an arithmetic number, because the mean of its divisors is an integer number (40185).

2³⁴⁵²⁰⁵ is an apocalyptic number.

345205 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

345205 is a deficient number, since it is larger than the sum of its proper divisors (137015).

345205 is a wasteful number, since it uses less digits than its factorization.

345205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428 (or 1421 counting only the distinct ones).

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

The square root of 345205 is about 587.5414878968. The cubic root of 345205 is about 70.1496797145.

Adding to 345205 its reverse (502543), we get a palindrome (847748).

The spelling of 345205 in words is "three hundred forty-five thousand, two hundred five".