6442553 has 16 divisors (see below), whose sum is σ = 7499520. Its totient is φ = 5484864.

The previous prime is 6442531. The next prime is 6442559. The reversal of 6442553 is 3552446.

It is a cyclic number.

It is not a de Polignac number, because 6442553 - 2¹² = 6438457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a d-powerful number, because it can be written as 6 + 4⁹ + 4¹¹ + 2¹⁵ + 5³ + 5⁹ + 3⁴ .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6442559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8300 + ... + 9042.

It is an arithmetic number, because the mean of its divisors is an integer number (468720).

Almost surely, 2^6442553 is an apocalyptic number.

It is an amenable number.

6442553 is a deficient number, since it is larger than the sum of its proper divisors (1056967).

6442553 is a wasteful number, since it uses less digits than its factorization.

6442553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808.

The product of its digits is 14400, while the sum is 29.

The square root of 6442553 is about 2538.2184697145. The cubic root of 6442553 is about 186.0741312400.

Adding to 6442553 its reverse (3552446), we get a palindrome (9994999).

The spelling of 6442553 in words is "six million, four hundred forty-two thousand, five hundred fifty-three".