6814021 has 2 divisors, whose sum is σ = 6814022. Its totient is φ = 6814020.

The previous prime is 6814019. The next prime is 6814037. The reversal of 6814021 is 1204186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3663396 + 3150625 = 1914^2 + 1775^2 .

It is a cyclic number.

It is not a de Polignac number, because 6814021 - 2¹ = 6814019 is a prime.

Together with 6814019, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6813983 and 6814001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6814001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3407010 + 3407011.

It is an arithmetic number, because the mean of its divisors is an integer number (3407011).

Almost surely, 2^6814021 is an apocalyptic number.

It is an amenable number.

6814021 is a deficient number, since it is larger than the sum of its proper divisors (1).

6814021 is an equidigital number, since it uses as much as digits as its factorization.

6814021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 6814021 is about 2610.3679817221. The cubic root of 6814021 is about 189.5837702790.

The spelling of 6814021 in words is "six million, eight hundred fourteen thousand, twenty-one".