421206 has 8 divisors (see below), whose sum is σ = 842424. Its totient is φ = 140400.

The previous prime is 421189. The next prime is 421207. The reversal of 421206 is 602124.

421206 = 323² + 324² + ... + 326².

It is a sphenic number, since it is the product of 3 distinct primes.

421206 is an admirable number.

It is a Smith number, since the sum of its digits (15) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421207) 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, 35095 + ... + 35106.

It is an arithmetic number, because the mean of its divisors is an integer number (105303).

2⁴²¹²⁰⁶ is an apocalyptic number.

421206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421206 is a wasteful number, since it uses less digits than its factorization.

421206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70206.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 421206 is about 649.0038520687. The cubic root of 421206 is about 74.9603345813.

The spelling of 421206 in words is "four hundred twenty-one thousand, two hundred six".