6460221 has 16 divisors (see below), whose sum is σ = 9180864. Its totient is φ = 4026624.

The previous prime is 6460213. The next prime is 6460231. The reversal of 6460221 is 1220646.

It is a happy number.

6460221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6460221 - 2³ = 6460213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6460231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9726 + ... + 10368.

It is an arithmetic number, because the mean of its divisors is an integer number (573804).

Almost surely, 2^6460221 is an apocalyptic number.

It is an amenable number.

6460221 is a deficient number, since it is larger than the sum of its proper divisors (2720643).

6460221 is a wasteful number, since it uses less digits than its factorization.

6460221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 6460221 is about 2541.6964806995. The cubic root of 6460221 is about 186.2440720003.

Adding to 6460221 its reverse (1220646), we get a palindrome (7680867).

The spelling of 6460221 in words is "six million, four hundred sixty thousand, two hundred twenty-one".