6721460 has 48 divisors (see below), whose sum is σ = 15268176. Its totient is φ = 2476032.

The previous prime is 6721447. The next prime is 6721469. The reversal of 6721460 is 641276.

It can be written as a sum of positive squares in 8 ways, for example, as 300304 + 6421156 = 548^2 + 2534^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721469) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17834 + ... + 18206.

It is an arithmetic number, because the mean of its divisors is an integer number (318087).

Almost surely, 2^6721460 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 6721460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7634088).

6721460 is an abundant number, since it is smaller than the sum of its proper divisors (8546716).

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

6721460 is a wasteful number, since it uses less digits than its factorization.

6721460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 6721460 is about 2592.5778676831. The cubic root of 6721460 is about 188.7214245588.

The spelling of 6721460 in words is "six million, seven hundred twenty-one thousand, four hundred sixty".