404543 has 4 divisors (see below), whose sum is σ = 405960. Its totient is φ = 403128.

The previous prime is 404539. The next prime is 404557. The reversal of 404543 is 345404.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 404543 - 2² = 404539 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 (404513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113 + ... + 906.

It is an arithmetic number, because the mean of its divisors is an integer number (101490).

2⁴⁰⁴⁵⁴³ is an apocalyptic number.

404543 is a deficient number, since it is larger than the sum of its proper divisors (1417).

404543 is a wasteful number, since it uses less digits than its factorization.

404543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 404543 is about 636.0369486123. The cubic root of 404543 is about 73.9585231409.

Adding to 404543 its reverse (345404), we get a palindrome (749947).

The spelling of 404543 in words is "four hundred four thousand, five hundred forty-three".