6902221 has 4 divisors (see below), whose sum is σ = 7308252. Its totient is φ = 6496192.

The previous prime is 6902219. The next prime is 6902237. The reversal of 6902221 is 1222096.

It is a happy number.

6902221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1929321 + 4972900 = 1389^2 + 2230^2 .

It is a cyclic number.

It is not a de Polignac number, because 6902221 - 2¹ = 6902219 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6902192 and 6902201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6902321) 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, 202990 + ... + 203023.

It is an arithmetic number, because the mean of its divisors is an integer number (1827063).

Almost surely, 2^6902221 is an apocalyptic number.

It is an amenable number.

6902221 is a deficient number, since it is larger than the sum of its proper divisors (406031).

6902221 is a wasteful number, since it uses less digits than its factorization.

6902221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406030.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 6902221 is about 2627.2078334232. The cubic root of 6902221 is about 190.3982505341.

The spelling of 6902221 in words is "six million, nine hundred two thousand, two hundred twenty-one".