It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a de Polignac number, because none of the positive numbers 2k-6442445 is a prime.
It is a d-powerful number, because it can be written as 62 + 4 + 43 + 215 + 49 + 411 + 59 .
It is a Curzon number.
It is a congruent number.
It is an unprimeable number.
Almost surely, 26442445 is an apocalyptic number.
It is an amenable number.
6442445 is a wasteful number, since it uses less digits than its factorization.
6442445 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 11935.
The square root of 6442445 is about 2538.1971948610. The cubic root of 6442445 is about 186.0730914804.
Subtracting from 6442445 its reverse (5442446), we obtain a palindrome (999999).
The spelling of 6442445 in words is "six million, four hundred forty-two thousand, four hundred forty-five".