6465221 has 4 divisors (see below), whose sum is σ = 7388832. Its totient is φ = 5541612.

The previous prime is 6465203. The next prime is 6465223. The reversal of 6465221 is 1225646.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1225646 = 2 ⋅612823.

It is a cyclic number.

It is not a de Polignac number, because 6465221 - 2¹⁰ = 6464197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461795 + ... + 461808.

It is an arithmetic number, because the mean of its divisors is an integer number (1847208).

Almost surely, 2^6465221 is an apocalyptic number.

It is an amenable number.

6465221 is a deficient number, since it is larger than the sum of its proper divisors (923611).

6465221 is an equidigital number, since it uses as much as digits as its factorization.

6465221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923610.

The product of its digits is 2880, while the sum is 26.

The square root of 6465221 is about 2542.6798854752. The cubic root of 6465221 is about 186.2921085519.

The spelling of 6465221 in words is "six million, four hundred sixty-five thousand, two hundred twenty-one".