543406 has 4 divisors (see below), whose sum is σ = 815112. Its totient is φ = 271702.

The previous prime is 543383. The next prime is 543407. The reversal of 543406 is 604345.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135850 + ... + 135853.

It is an arithmetic number, because the mean of its divisors is an integer number (203778).

2⁵⁴³⁴⁰⁶ is an apocalyptic number.

543406 is a deficient number, since it is larger than the sum of its proper divisors (271706).

543406 is a wasteful number, since it uses less digits than its factorization.

543406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271705.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 543406 is about 737.1607694391. The cubic root of 543406 is about 81.6033791693.

It can be divided in two parts, 543 and 406, that added together give a palindrome (949).

The spelling of 543406 in words is "five hundred forty-three thousand, four hundred six".