421716 has 24 divisors (see below), whose sum is σ = 995904. Its totient is φ = 138880.

The previous prime is 421711. The next prime is 421717. The reversal of 421716 is 617124.

It is a junction number, because it is equal to n+sod(n) for n = 421692 and 421701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421711) by changing a digit.

421716 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 7 ways as a sum of consecutive naturals, for example, 1201 + ... + 1511.

It is an arithmetic number, because the mean of its divisors is an integer number (41496).

2⁴²¹⁷¹⁶ is an apocalyptic number.

It is an amenable number.

421716 is an abundant number, since it is smaller than the sum of its proper divisors (574188).

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

421716 is a wasteful number, since it uses less digits than its factorization.

421716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 429 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 421716 is about 649.3966430465. The cubic root of 421716 is about 74.9905765938.

The spelling of 421716 in words is "four hundred twenty-one thousand, seven hundred sixteen".