345891 has 24 divisors (see below), whose sum is σ = 580944. Its totient is φ = 181440.

The previous prime is 345889. The next prime is 345907. The reversal of 345891 is 198543.

It is not a de Polignac number, because 345891 - 2¹ = 345889 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345891.

It is not an unprimeable number, because it can be changed into a prime (345811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1821 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (24206).

2³⁴⁵⁸⁹¹ is an apocalyptic number.

345891 is a deficient number, since it is larger than the sum of its proper divisors (235053).

345891 is a wasteful number, since it uses less digits than its factorization.

345891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 204 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 345891 is about 588.1249867163. The cubic root of 345891 is about 70.1961166998.

The spelling of 345891 in words is "three hundred forty-five thousand, eight hundred ninety-one".