421626 has 8 divisors (see below), whose sum is σ = 843264. Its totient is φ = 140540.

The previous prime is 421621. The next prime is 421633. The reversal of 421626 is 626124.

It is a happy number.

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

421626 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35130 + ... + 35141.

It is an arithmetic number, because the mean of its divisors is an integer number (105408).

2⁴²¹⁶²⁶ is an apocalyptic number.

421626 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.

421626 is a wasteful number, since it uses less digits than its factorization.

421626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70276.

The product of its digits is 576, while the sum is 21.

The square root of 421626 is about 649.3273442571. The cubic root of 421626 is about 74.9852415405.

The spelling of 421626 in words is "four hundred twenty-one thousand, six hundred twenty-six".