1421568 has 54 divisors (see below), whose sum is σ = 4105374. Its totient is φ = 473088.

The previous prime is 1421549. The next prime is 1421569. The reversal of 1421568 is 8651241.

It can be written as a sum of positive squares in only one way, i.e., 831744 + 589824 = 912^2 + 768^2 .

It is not an unprimeable number, because it can be changed into a prime (1421569) 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 in 5 ways as a sum of consecutive naturals, for example, 1996 + ... + 2612.

2^1421568 is an apocalyptic number.

1421568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2052687).

1421568 is an abundant number, since it is smaller than the sum of its proper divisors (2683806).

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

1421568 is an equidigital number, since it uses as much as digits as its factorization.

1421568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 622 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1421568 is about 1192.2952654439. The cubic root of 1421568 is about 112.4404425500.

The spelling of 1421568 in words is "one million, four hundred twenty-one thousand, five hundred sixty-eight".