421616 has 20 divisors (see below), whose sum is σ = 880152. Its totient is φ = 194496.

The previous prime is 421609. The next prime is 421621. The reversal of 421616 is 616124.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

421616 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 806 + ... + 1221.

2⁴²¹⁶¹⁶ is an apocalyptic number.

It is an amenable number.

421616 is an abundant number, since it is smaller than the sum of its proper divisors (458536).

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

421616 is a wasteful number, since it uses less digits than its factorization.

421616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048 (or 2042 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 421616 is about 649.3196439351. The cubic root of 421616 is about 74.9846487099.

The spelling of 421616 in words is "four hundred twenty-one thousand, six hundred sixteen".