6721044 has 48 divisors (see below), whose sum is σ = 17418240. Its totient is φ = 1999840.

The previous prime is 6721019. The next prime is 6721051. The reversal of 6721044 is 4401276.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7357 + ... + 8219.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^6721044 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 6721044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8709120).

6721044 is an abundant number, since it is smaller than the sum of its proper divisors (10697196).

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

6721044 is a wasteful number, since it uses less digits than its factorization.

6721044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 6721044 is about 2592.4976374145. The cubic root of 6721044 is about 188.7175310727.

The spelling of 6721044 in words is "six million, seven hundred twenty-one thousand, forty-four".