6841221 has 4 divisors (see below), whose sum is σ = 9121632. Its totient is φ = 4560812.

The previous prime is 6841217. The next prime is 6841223. The reversal of 6841221 is 1221486.

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 6841221 - 2² = 6841217 is a prime.

It is an Ulam number.

It is a D-number.

6841221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6841191 and 6841200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6841223) 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, 1140201 + ... + 1140206.

It is an arithmetic number, because the mean of its divisors is an integer number (2280408).

Almost surely, 2^6841221 is an apocalyptic number.

It is an amenable number.

6841221 is a deficient number, since it is larger than the sum of its proper divisors (2280411).

6841221 is a wasteful number, since it uses less digits than its factorization.

6841221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280410.

The product of its digits is 768, while the sum is 24.

The square root of 6841221 is about 2615.5727862172. The cubic root of 6841221 is about 189.8356935954.

The spelling of 6841221 in words is "six million, eight hundred forty-one thousand, two hundred twenty-one".