420533 has 4 divisors (see below), whose sum is σ = 426528. Its totient is φ = 414540.

The previous prime is 420521. The next prime is 420551. The reversal of 420533 is 335024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420533 - 2¹⁶ = 354997 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 (420503) 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, 2891 + ... + 3032.

It is an arithmetic number, because the mean of its divisors is an integer number (106632).

2⁴²⁰⁵³³ is an apocalyptic number.

It is an amenable number.

420533 is a deficient number, since it is larger than the sum of its proper divisors (5995).

420533 is an equidigital number, since it uses as much as digits as its factorization.

420533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 420533 is about 648.4851578872. The cubic root of 420533 is about 74.9203895998.

Adding to 420533 its reverse (335024), we get a palindrome (755557).

The spelling of 420533 in words is "four hundred twenty thousand, five hundred thirty-three".