243456 has 36 divisors (see below), whose sum is σ = 649992. Its totient is φ = 80896.

The previous prime is 243437. The next prime is 243461. The reversal of 243456 is 654342.

243456 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a d-powerful number, because it can be written as 2¹⁷ + 4³ + 4⁸ + 3 + 5³ + 6⁶ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610 + ... + 926.

2²⁴³⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324996).

243456 is an abundant number, since it is smaller than the sum of its proper divisors (406536).

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

243456 is an equidigital number, since it uses as much as digits as its factorization.

243456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 322 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 243456 is about 493.4126062435. The cubic root of 243456 is about 62.4415239726.

Adding to 243456 its reverse (654342), we get a palindrome (897798).

It can be divided in two parts, 24345 and 6, that multiplied together give a triangular number (146070 = T₅₄₀).

The spelling of 243456 in words is "two hundred forty-three thousand, four hundred fifty-six".