6826721 has 8 divisors (see below), whose sum is σ = 7553088. Its totient is φ = 6118000.

The previous prime is 6826709. The next prime is 6826739. The reversal of 6826721 is 1276286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6826721 - 2⁶ = 6826657 is a prime.

It is a super-2 number, since 2×6826721² = 93208239223682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6826751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3590 + ... + 5151.

It is an arithmetic number, because the mean of its divisors is an integer number (944136).

Almost surely, 2^6826721 is an apocalyptic number.

It is an amenable number.

6826721 is a deficient number, since it is larger than the sum of its proper divisors (726367).

6826721 is a wasteful number, since it uses less digits than its factorization.

6826721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8823.

The product of its digits is 8064, while the sum is 32.

The square root of 6826721 is about 2612.7994565217. The cubic root of 6826721 is about 189.7014795138.

The spelling of 6826721 in words is "six million, eight hundred twenty-six thousand, seven hundred twenty-one".