420573 has 4 divisors (see below), whose sum is σ = 560768. Its totient is φ = 280380.

The previous prime is 420571. The next prime is 420593. The reversal of 420573 is 375024.

It is a happy number.

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 not a de Polignac number, because 420573 - 2¹ = 420571 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon 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 (420571) 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, 70093 + ... + 70098.

It is an arithmetic number, because the mean of its divisors is an integer number (140192).

2⁴²⁰⁵⁷³ is an apocalyptic number.

It is an amenable number.

420573 is a deficient number, since it is larger than the sum of its proper divisors (140195).

420573 is a wasteful number, since it uses less digits than its factorization.

420573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140194.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 420573 is about 648.5159982606. The cubic root of 420573 is about 74.9227649350.

Adding to 420573 its reverse (375024), we get a palindrome (795597).

It can be divided in two parts, 4205 and 73, that added together give a triangular number (4278 = T₉₂).

The spelling of 420573 in words is "four hundred twenty thousand, five hundred seventy-three".