543842 has 12 divisors (see below), whose sum is σ = 883890. Its totient is φ = 250848.

The previous prime is 543841. The next prime is 543853. The reversal of 543842 is 248345.

It can be written as a sum of positive squares in 3 ways, for example, as 434281 + 109561 = 659^2 + 331^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (543841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 467 + ... + 1142.

2⁵⁴³⁸⁴² is an apocalyptic number.

543842 is a deficient number, since it is larger than the sum of its proper divisors (340048).

543842 is a wasteful number, since it uses less digits than its factorization.

543842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637 (or 1624 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 543842 is about 737.4564393915. The cubic root of 543842 is about 81.6251980684.

The spelling of 543842 in words is "five hundred forty-three thousand, eight hundred forty-two".