543538 has 4 divisors (see below), whose sum is σ = 815310. Its totient is φ = 271768.

The previous prime is 543509. The next prime is 543539. The reversal of 543538 is 835345.

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

It can be written as a sum of positive squares in only one way, i.e., 310249 + 233289 = 557^2 + 483^2 .

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (543539) by changing a digit.

543538 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135883 + ... + 135886.

2⁵⁴³⁵³⁸ is an apocalyptic number.

543538 is a deficient number, since it is larger than the sum of its proper divisors (271772).

543538 is a wasteful number, since it uses less digits than its factorization.

543538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271771.

The product of its digits is 7200, while the sum is 28.

The square root of 543538 is about 737.2502967107. The cubic root of 543538 is about 81.6099861225.

It can be divided in two parts, 543 and 538, that added together give a triangular number (1081 = T₄₆).

The spelling of 543538 in words is "five hundred forty-three thousand, five hundred thirty-eight".