6487321 has 4 divisors (see below), whose sum is σ = 6662692. Its totient is φ = 6311952.

The previous prime is 6487301. The next prime is 6487337. The reversal of 6487321 is 1237846.

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 6071296 + 416025 = 2464^2 + 645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6487321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6487301) 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 3 ways as a sum of consecutive naturals, for example, 87630 + ... + 87703.

It is an arithmetic number, because the mean of its divisors is an integer number (1665673).

Almost surely, 2^6487321 is an apocalyptic number.

It is an amenable number.

6487321 is a deficient number, since it is larger than the sum of its proper divisors (175371).

6487321 is a wasteful number, since it uses less digits than its factorization.

6487321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175370.

The product of its digits is 8064, while the sum is 31.

The square root of 6487321 is about 2547.0219865561. The cubic root of 6487321 is about 186.5041339614.

The spelling of 6487321 in words is "six million, four hundred eighty-seven thousand, three hundred twenty-one".