345450 has 72 divisors (see below), whose sum is σ = 1017792. Its totient is φ = 77280.

The previous prime is 345431. The next prime is 345451. The reversal of 345450 is 54543.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (345451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7327 + ... + 7373.

It is an arithmetic number, because the mean of its divisors is an integer number (14136).

2³⁴⁵⁴⁵⁰ is an apocalyptic number.

345450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 345450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508896).

345450 is an abundant number, since it is smaller than the sum of its proper divisors (672342).

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

345450 is a wasteful number, since it uses less digits than its factorization.

345450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 345450 is about 587.7499468311. The cubic root of 345450 is about 70.1662714085.

Adding to 345450 its reverse (54543), we get a palindrome (399993).

The spelling of 345450 in words is "three hundred forty-five thousand, four hundred fifty".