6445522 has 16 divisors (see below), whose sum is σ = 10324800. Its totient is φ = 3008880.

The previous prime is 6445501. The next prime is 6445529. The reversal of 6445522 is 2255446.

It is a super-3 number, since 3×6445522³ (a number of 21 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6445529) 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 7 ways as a sum of consecutive naturals, for example, 1504 + ... + 3892.

It is an arithmetic number, because the mean of its divisors is an integer number (645300).

Almost surely, 2^6445522 is an apocalyptic number.

6445522 is a deficient number, since it is larger than the sum of its proper divisors (3879278).

6445522 is a wasteful number, since it uses less digits than its factorization.

6445522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481.

The product of its digits is 9600, while the sum is 28.

The square root of 6445522 is about 2538.8032613812. The cubic root of 6445522 is about 186.1027104514.

The spelling of 6445522 in words is "six million, four hundred forty-five thousand, five hundred twenty-two".