421984 has 12 divisors (see below), whose sum is σ = 830844. Its totient is φ = 210976.

The previous prime is 421973. The next prime is 421987. The reversal of 421984 is 489124.

421984 is nontrivially palindromic in base 14.

421984 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

421984 is an undulating number in base 14.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6562 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (69237).

2⁴²¹⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

421984 is a deficient number, since it is larger than the sum of its proper divisors (408860).

421984 is a wasteful number, since it uses less digits than its factorization.

421984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13197 (or 13189 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 421984 is about 649.6029556583. The cubic root of 421984 is about 75.0064587030.

The spelling of 421984 in words is "four hundred twenty-one thousand, nine hundred eighty-four".