6464321 has 4 divisors (see below), whose sum is σ = 6489732. Its totient is φ = 6438912.

The previous prime is 6464317. The next prime is 6464323. The reversal of 6464321 is 1234646.

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 5340721 + 1123600 = 2311^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 6464321 - 2² = 6464317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6464323) 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, 12320 + ... + 12833.

It is an arithmetic number, because the mean of its divisors is an integer number (1622433).

Almost surely, 2^6464321 is an apocalyptic number.

It is an amenable number.

6464321 is a deficient number, since it is larger than the sum of its proper divisors (25411).

6464321 is a wasteful number, since it uses less digits than its factorization.

6464321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25410.

The product of its digits is 3456, while the sum is 26.

The square root of 6464321 is about 2542.5029006866. The cubic root of 6464321 is about 186.2834638008.

Adding to 6464321 its reverse (1234646), we get a palindrome (7698967).

The spelling of 6464321 in words is "six million, four hundred sixty-four thousand, three hundred twenty-one".