1421984 has 24 divisors (see below), whose sum is σ = 2877588. Its totient is φ = 691200.

The previous prime is 1421977. The next prime is 1421989. The reversal of 1421984 is 4891241.

It can be written as a sum of positive squares in 2 ways, for example, as 1392400 + 29584 = 1180^2 + 172^2 .

It is not an unprimeable number, because it can be changed into a prime (1421989) 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, 584 + ... + 1784.

2^1421984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1438794).

1421984 is an abundant number, since it is smaller than the sum of its proper divisors (1455604).

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

1421984 is a wasteful number, since it uses less digits than its factorization.

1421984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 1240 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 1421984 is about 1192.4697061142. The cubic root of 1421984 is about 112.4514094687.

The spelling of 1421984 in words is "one million, four hundred twenty-one thousand, nine hundred eighty-four".