421213 has 4 divisors (see below), whose sum is σ = 453628. Its totient is φ = 388800.

The previous prime is 421207. The next prime is 421241. The reversal of 421213 is 312124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 289444 + 131769 = 538^2 + 363^2 .

It is a cyclic number.

It is not a de Polignac number, because 421213 - 2⁵ = 421181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 32401 = 421213 / (4 + 2 + 1 + 2 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421193 and 421202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421273) 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, 16188 + ... + 16213.

It is an arithmetic number, because the mean of its divisors is an integer number (113407).

2⁴²¹²¹³ is an apocalyptic number.

It is an amenable number.

421213 is a deficient number, since it is larger than the sum of its proper divisors (32415).

421213 is a wasteful number, since it uses less digits than its factorization.

421213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32414.

The product of its digits is 48, while the sum is 13.

The square root of 421213 is about 649.0092449264. The cubic root of 421213 is about 74.9607498329.

Adding to 421213 its reverse (312124), we get a palindrome (733337).

It can be divided in two parts, 42121 and 3, that added together give a palindrome (42124).

The spelling of 421213 in words is "four hundred twenty-one thousand, two hundred thirteen".