6500421421 has 8 divisors (see below), whose sum is σ = 7025194400. Its totient is φ = 5979182832.

The previous prime is 6500421371. The next prime is 6500421457. The reversal of 6500421421 is 1241240056.

It is a happy number.

6500421421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6500421421 - 2⁹ = 6500420909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6500421481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879771 + ... + 887128.

It is an arithmetic number, because the mean of its divisors is an integer number (878149300).

Almost surely, 2^6500421421 is an apocalyptic number.

It is an amenable number.

6500421421 is a deficient number, since it is larger than the sum of its proper divisors (524772979).

6500421421 is a wasteful number, since it uses less digits than its factorization.

6500421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767195.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 6500421421 is about 80625.1909827195. The cubic root of 6500421421 is about 1866.2959098084.

Adding to 6500421421 its reverse (1241240056), we get a palindrome (7741661477).

The spelling of 6500421421 in words is "six billion, five hundred million, four hundred twenty-one thousand, four hundred twenty-one".