6721279 has 4 divisors (see below), whose sum is σ = 6732376. Its totient is φ = 6710184.

The previous prime is 6721277. The next prime is 6721283. The reversal of 6721279 is 9721276.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6721279 - 2¹ = 6721277 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721277) 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, 4584 + ... + 5869.

It is an arithmetic number, because the mean of its divisors is an integer number (1683094).

Almost surely, 2^6721279 is an apocalyptic number.

6721279 is a deficient number, since it is larger than the sum of its proper divisors (11097).

6721279 is a wasteful number, since it uses less digits than its factorization.

6721279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11096.

The product of its digits is 10584, while the sum is 34.

The square root of 6721279 is about 2592.5429601069. The cubic root of 6721279 is about 188.7197305377.

The spelling of 6721279 in words is "six million, seven hundred twenty-one thousand, two hundred seventy-nine".