420559 has 4 divisors (see below), whose sum is σ = 426904. Its totient is φ = 414216.

The previous prime is 420557. The next prime is 420569. The reversal of 420559 is 955024.

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 420559 - 2¹ = 420557 is a prime.

It is an Ulam number.

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 (420551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3072 + ... + 3205.

It is an arithmetic number, because the mean of its divisors is an integer number (106726).

2⁴²⁰⁵⁵⁹ is an apocalyptic number.

420559 is a deficient number, since it is larger than the sum of its proper divisors (6345).

420559 is an equidigital number, since it uses as much as digits as its factorization.

420559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6344.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 420559 is about 648.5052042968. The cubic root of 420559 is about 74.9219335848.

It can be divided in two parts, 420 and 559, that added together give a palindrome (979).

The spelling of 420559 in words is "four hundred twenty thousand, five hundred fifty-nine".