6421752 has 48 divisors (see below), whose sum is σ = 17628000. Its totient is φ = 2111616.

The previous prime is 6421739. The next prime is 6421759. The reversal of 6421752 is 2571246.

6421752 is a `hidden beast` number, since 642 + 17 + 5 + 2 = 666.

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 (6421759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5124 + ... + 6252.

It is an arithmetic number, because the mean of its divisors is an integer number (367250).

Almost surely, 2^6421752 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 6421752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8814000).

6421752 is an abundant number, since it is smaller than the sum of its proper divisors (11206248).

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

6421752 is a wasteful number, since it uses less digits than its factorization.

6421752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1213 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 6421752 is about 2534.1175979027. The cubic root of 6421752 is about 185.8736568282.

Adding to 6421752 its reverse (2571246), we get a palindrome (8992998).

The spelling of 6421752 in words is "six million, four hundred twenty-one thousand, seven hundred fifty-two".