6544442 has 4 divisors (see below), whose sum is σ = 9816666. Its totient is φ = 3272220.

The previous prime is 6544429. The next prime is 6544451. The reversal of 6544442 is 2444456.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 4206601 + 2337841 = 2051^2 + 1529^2 .

It is a nialpdrome in base 10.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1636109 + ... + 1636112.

Almost surely, 2^6544442 is an apocalyptic number.

6544442 is a deficient number, since it is larger than the sum of its proper divisors (3272224).

6544442 is a wasteful number, since it uses less digits than its factorization.

6544442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272223.

The product of its digits is 15360, while the sum is 29.

The square root of 6544442 is about 2558.2107028155. The cubic root of 6544442 is about 187.0499261395.

Adding to 6544442 its reverse (2444456), we get a palindrome (8988898).

The spelling of 6544442 in words is "six million, five hundred forty-four thousand, four hundred forty-two".