421006 has 8 divisors (see below), whose sum is σ = 635544. Its totient is φ = 209160.

The previous prime is 420997. The next prime is 421009. The reversal of 421006 is 600124.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421009) 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, 220 + ... + 943.

It is an arithmetic number, because the mean of its divisors is an integer number (79443).

2⁴²¹⁰⁰⁶ is an apocalyptic number.

421006 is a deficient number, since it is larger than the sum of its proper divisors (214538).

421006 is a wasteful number, since it uses less digits than its factorization.

421006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346.

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

The square root of 421006 is about 648.8497514833. The cubic root of 421006 is about 74.9484683049.

The spelling of 421006 in words is "four hundred twenty-one thousand, six".