6475221 has 12 divisors (see below), whose sum is σ = 9699872. Its totient is φ = 4316652.

The previous prime is 6475177. The next prime is 6475223. The reversal of 6475221 is 1225746.

It is not a de Polignac number, because 6475221 - 2²¹ = 4378069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6475223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13081 + ... + 13566.

Almost surely, 2^6475221 is an apocalyptic number.

It is an amenable number.

6475221 is a deficient number, since it is larger than the sum of its proper divisors (3224651).

6475221 is an equidigital number, since it uses as much as digits as its factorization.

6475221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26662 (or 26650 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 6475221 is about 2544.6455548858. The cubic root of 6475221 is about 186.3881074062.

The spelling of 6475221 in words is "six million, four hundred seventy-five thousand, two hundred twenty-one".