6821712 has 40 divisors (see below), whose sum is σ = 19582080. Its totient is φ = 2273760.

The previous prime is 6821707. The next prime is 6821723. The reversal of 6821712 is 2171286.

It is a super-2 number, since 2×6821712² = 93071509221888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7464 + ... + 8327.

It is an arithmetic number, because the mean of its divisors is an integer number (489552).

Almost surely, 2^6821712 is an apocalyptic number.

It is an amenable number.

6821712 is an abundant number, since it is smaller than the sum of its proper divisors (12760368).

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

6821712 is a wasteful number, since it uses less digits than its factorization.

6821712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15808 (or 15796 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 6821712 is about 2611.8407302131. The cubic root of 6821712 is about 189.6550713281.

Adding to 6821712 its reverse (2171286), we get a palindrome (8992998).

The spelling of 6821712 in words is "six million, eight hundred twenty-one thousand, seven hundred twelve".