6721360 has 20 divisors (see below), whose sum is σ = 15627348. Its totient is φ = 2688512.

The previous prime is 6721343. The next prime is 6721361. The reversal of 6721360 is 631276.

It can be written as a sum of positive squares in 2 ways, for example, as 1577536 + 5143824 = 1256^2 + 2268^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721361) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 41929 + ... + 42088.

Almost surely, 2^6721360 is an apocalyptic number.

It is an amenable number.

6721360 is an abundant number, since it is smaller than the sum of its proper divisors (8905988).

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

6721360 is a wasteful number, since it uses less digits than its factorization.

6721360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84030 (or 84024 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 6721360 is about 2592.5585817875. The cubic root of 6721360 is about 188.7204886393.

The spelling of 6721360 in words is "six million, seven hundred twenty-one thousand, three hundred sixty".