6421376 has 64 divisors (see below), whose sum is σ = 14651280. Its totient is φ = 2777088.

The previous prime is 6421369. The next prime is 6421403. The reversal of 6421376 is 6731246.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable 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, 28175 + ... + 28401.

Almost surely, 2^6421376 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 6421376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7325640).

6421376 is an abundant number, since it is smaller than the sum of its proper divisors (8229904).

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

6421376 is a wasteful number, since it uses less digits than its factorization.

6421376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 259 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 6421376 is about 2534.0434092572. The cubic root of 6421376 is about 185.8700290613.

The spelling of 6421376 in words is "six million, four hundred twenty-one thousand, three hundred seventy-six".