420543 has 6 divisors (see below), whose sum is σ = 607464. Its totient is φ = 280356.

The previous prime is 420521. The next prime is 420551. The reversal of 420543 is 345024.

It is a happy number.

It is not a de Polignac number, because 420543 - 2⁶ = 420479 is a prime.

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 (420503) 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 5 ways as a sum of consecutive naturals, for example, 23355 + ... + 23372.

It is an arithmetic number, because the mean of its divisors is an integer number (101244).

2⁴²⁰⁵⁴³ is an apocalyptic number.

420543 is a deficient number, since it is larger than the sum of its proper divisors (186921).

420543 is a wasteful number, since it uses less digits than its factorization.

420543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46733 (or 46730 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 420543 is about 648.4928681181. The cubic root of 420543 is about 74.9209834477.

Adding to 420543 its reverse (345024), we get a palindrome (765567).

The spelling of 420543 in words is "four hundred twenty thousand, five hundred forty-three".