6442447 has 4 divisors (see below), whose sum is σ = 7028136. Its totient is φ = 5856760.

The previous prime is 6442433. The next prime is 6442459. The reversal of 6442447 is 7442446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6442447 - 2¹⁵ = 6409679 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 (6442427) 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, 292828 + ... + 292849.

It is an arithmetic number, because the mean of its divisors is an integer number (1757034).

Almost surely, 2^6442447 is an apocalyptic number.

6442447 is a deficient number, since it is larger than the sum of its proper divisors (585689).

6442447 is a wasteful number, since it uses less digits than its factorization.

6442447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585688.

The product of its digits is 21504, while the sum is 31.

The square root of 6442447 is about 2538.1975888413. The cubic root of 6442447 is about 186.0731107353.

Subtracting 6442447 from its reverse (7442446), we obtain a palindrome (999999).

It can be divided in two parts, 6442 and 447, that added together give a square (6889 = 83²).

The spelling of 6442447 in words is "six million, four hundred forty-two thousand, four hundred forty-seven".