6349221 has 12 divisors (see below), whose sum is σ = 9199372. Its totient is φ = 4219776.

The previous prime is 6349199. The next prime is 6349223. The reversal of 6349221 is 1229436.

6349221 is a `hidden beast` number, since 634 + 9 + 2 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3744225 + 2604996 = 1935^2 + 1614^2 .

It is not a de Polignac number, because 6349221 - 2⁶ = 6349157 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 3⁷ + 4¹¹ + 9³ + 2¹³ + 2²¹ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6349223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2685 + ... + 4461.

Almost surely, 2^6349221 is an apocalyptic number.

It is an amenable number.

6349221 is a deficient number, since it is larger than the sum of its proper divisors (2850151).

6349221 is a wasteful number, since it uses less digits than its factorization.

6349221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2177 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 6349221 is about 2519.7660605699. The cubic root of 6349221 is about 185.1712171899.

It can be divided in two parts, 63 and 49221, that added together give a square (49284 = 222²).

The spelling of 6349221 in words is "six million, three hundred forty-nine thousand, two hundred twenty-one".