543421 has 4 divisors (see below), whose sum is σ = 567072. Its totient is φ = 519772.

The previous prime is 543407. The next prime is 543427. The reversal of 543421 is 124345.

543421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 543421 - 2¹³ = 535229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11791 + ... + 11836.

It is an arithmetic number, because the mean of its divisors is an integer number (141768).

2⁵⁴³⁴²¹ is an apocalyptic number.

It is an amenable number.

543421 is a deficient number, since it is larger than the sum of its proper divisors (23651).

543421 is a wasteful number, since it uses less digits than its factorization.

543421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23650.

The product of its digits is 480, while the sum is 19.

The square root of 543421 is about 737.1709435402. The cubic root of 543421 is about 81.6041300133.

Adding to 543421 its reverse (124345), we get a palindrome (667766).

The spelling of 543421 in words is "five hundred forty-three thousand, four hundred twenty-one".