428543 has 4 divisors (see below), whose sum is σ = 432888. Its totient is φ = 424200.

The previous prime is 428539. The next prime is 428551. The reversal of 428543 is 345824.

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

It is not a de Polignac number, because 428543 - 2² = 428539 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021 + ... + 2222.

It is an arithmetic number, because the mean of its divisors is an integer number (108222).

2⁴²⁸⁵⁴³ is an apocalyptic number.

428543 is a deficient number, since it is larger than the sum of its proper divisors (4345).

428543 is a wasteful number, since it uses less digits than its factorization.

428543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4344.

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

The square root of 428543 is about 654.6319576678. The cubic root of 428543 is about 75.3930770145.

The spelling of 428543 in words is "four hundred twenty-eight thousand, five hundred forty-three".