420213 has 4 divisors (see below), whose sum is σ = 560288. Its totient is φ = 280140.

The previous prime is 420193. The next prime is 420221. The reversal of 420213 is 312024.

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 420213 - 2⁶ = 420149 is a prime.

It is a D-number.

It is a Duffinian number.

420213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420253) 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, 70033 + ... + 70038.

It is an arithmetic number, because the mean of its divisors is an integer number (140072).

2⁴²⁰²¹³ is an apocalyptic number.

It is an amenable number.

420213 is a deficient number, since it is larger than the sum of its proper divisors (140075).

420213 is a wasteful number, since it uses less digits than its factorization.

420213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140074.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 420213 is about 648.2383820787. The cubic root of 420213 is about 74.9013814931.

Adding to 420213 its reverse (312024), we get a palindrome (732237).

It can be divided in two parts, 42021 and 3, that added together give a palindrome (42024).

The spelling of 420213 in words is "four hundred twenty thousand, two hundred thirteen".