345546 has 32 divisors (see below), whose sum is σ = 787200. Its totient is φ = 113724.

The previous prime is 345533. The next prime is 345547. The reversal of 345546 is 645543.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (345547) 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, 4335 + ... + 4413.

It is an arithmetic number, because the mean of its divisors is an integer number (24600).

2³⁴⁵⁵⁴⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393600).

345546 is an abundant number, since it is smaller than the sum of its proper divisors (441654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

345546 is an frugal number, since it uses more digits than its factorization.

345546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 84 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 345546 is about 587.8316085411. The cubic root of 345546 is about 70.1727705046.

The spelling of 345546 in words is "three hundred forty-five thousand, five hundred forty-six".