543240 has 64 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 144576.

The previous prime is 543233. The next prime is 543241. The reversal of 543240 is 42345.

It is a happy number.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

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

It is a d-powerful number, because it can be written as 5³ + 4⁴ + 2¹⁹ + 3⁷ + 4⁷ + 0 .

It is not an unprimeable number, because it can be changed into a prime (543241) by changing a digit.

543240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 829 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (28350).

2⁵⁴³²⁴⁰ 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 543240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907200).

543240 is an abundant number, since it is smaller than the sum of its proper divisors (1271160).

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

543240 is a wasteful number, since it uses less digits than its factorization.

543240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 513 counting only the distinct ones).

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

The square root of 543240 is about 737.0481666757. The cubic root of 543240 is about 81.5950689062.

Adding to 543240 its reverse (42345), we get a palindrome (585585).

The spelling of 543240 in words is "five hundred forty-three thousand, two hundred forty".