6442450921 has 8 divisors (see below), whose sum is σ = 6517031040. Its totient is φ = 6367919712.

The previous prime is 6442450919. The next prime is 6442450933. The reversal of 6442450921 is 1290542446.

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 6442450921 - 2¹ = 6442450919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442450981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297756 + ... + 318658.

It is an arithmetic number, because the mean of its divisors is an integer number (814628880).

Almost surely, 2^6442450921 is an apocalyptic number.

It is an amenable number.

6442450921 is a deficient number, since it is larger than the sum of its proper divisors (74580119).

6442450921 is a wasteful number, since it uses less digits than its factorization.

6442450921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24455.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 6442450921 is about 80264.8797482436. The cubic root of 6442450921 is about 1860.7314848458.

The spelling of 6442450921 in words is "six billion, four hundred forty-two million, four hundred fifty thousand, nine hundred twenty-one".