243450 has 36 divisors (see below), whose sum is σ = 655278. Its totient is φ = 64800.

The previous prime is 243437. The next prime is 243461. The reversal of 243450 is 54342.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 168921 + 74529 = 411^2 + 273^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 180 + ... + 720.

2²⁴³⁴⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327639).

243450 is an abundant number, since it is smaller than the sum of its proper divisors (411828).

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

243450 is a wasteful number, since it uses less digits than its factorization.

243450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 243450 is about 493.4065261020. The cubic root of 243450 is about 62.4410110090.

Adding to 243450 its reverse (54342), we get a palindrome (297792).

The spelling of 243450 in words is "two hundred forty-three thousand, four hundred fifty".