345805 has 16 divisors (see below), whose sum is σ = 451584. Its totient is φ = 253440.

The previous prime is 345803. The next prime is 345811. The reversal of 345805 is 508543.

It is a happy number.

It is not a de Polignac number, because 345805 - 2¹ = 345803 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 345805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3517 + ... + 3613.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

2³⁴⁵⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

345805 is a deficient number, since it is larger than the sum of its proper divisors (105779).

345805 is a wasteful number, since it uses less digits than its factorization.

345805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 345805 is about 588.0518684606. The cubic root of 345805 is about 70.1902985216.

The spelling of 345805 in words is "three hundred forty-five thousand, eight hundred five".