6421448 has 32 divisors (see below), whose sum is σ = 13448160. Its totient is φ = 2849280.

The previous prime is 6421421. The next prime is 6421477. The reversal of 6421448 is 8441246.

It is a self number, because there is not a number n which added to its sum of digits gives 6421448.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936 + ... + 4632.

It is an arithmetic number, because the mean of its divisors is an integer number (420255).

Almost surely, 2^6421448 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 6421448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6724080).

6421448 is an abundant number, since it is smaller than the sum of its proper divisors (7026712).

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

6421448 is a wasteful number, since it uses less digits than its factorization.

6421448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757 (or 1753 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 6421448 is about 2534.0576157617. The cubic root of 6421448 is about 185.8707237510.

It can be divided in two parts, 64 and 21448, that added together give a palindrome (21512).

The spelling of 6421448 in words is "six million, four hundred twenty-one thousand, four hundred forty-eight".