6721063 has 4 divisors (see below), whose sum is σ = 6726760. Its totient is φ = 6715368.

The previous prime is 6721061. The next prime is 6721093. The reversal of 6721063 is 3601276.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6721063 - 2¹ = 6721061 is a prime.

It is a Duffinian number.

6721063 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345 + ... + 3682.

It is an arithmetic number, because the mean of its divisors is an integer number (1681690).

Almost surely, 2^6721063 is an apocalyptic number.

6721063 is a deficient number, since it is larger than the sum of its proper divisors (5697).

6721063 is a wasteful number, since it uses less digits than its factorization.

6721063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5696.

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

The square root of 6721063 is about 2592.5013018319. The cubic root of 6721063 is about 188.7177089037.

The spelling of 6721063 in words is "six million, seven hundred twenty-one thousand, sixty-three".