6811421 has 4 divisors (see below), whose sum is σ = 6913152. Its totient is φ = 6709692.

The previous prime is 6811403. The next prime is 6811423. The reversal of 6811421 is 1241186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6811421 - 2¹⁴ = 6795037 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6811423) 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, 50765 + ... + 50898.

It is an arithmetic number, because the mean of its divisors is an integer number (1728288).

Almost surely, 2^6811421 is an apocalyptic number.

It is an amenable number.

6811421 is a deficient number, since it is larger than the sum of its proper divisors (101731).

6811421 is a wasteful number, since it uses less digits than its factorization.

6811421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101730.

The product of its digits is 384, while the sum is 23.

The square root of 6811421 is about 2609.8699201301. The cubic root of 6811421 is about 189.5596542928.

The spelling of 6811421 in words is "six million, eight hundred eleven thousand, four hundred twenty-one".