6445456 has 20 divisors (see below), whose sum is σ = 12619852. Its totient is φ = 3188736.

The previous prime is 6445447. The next prime is 6445457. The reversal of 6445456 is 6545446.

It can be written as a sum of positive squares in 2 ways, for example, as 1081600 + 5363856 = 1040^2 + 2316^2 .

It is not an unprimeable number, because it can be changed into a prime (6445457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525 + ... + 3628.

Almost surely, 2^6445456 is an apocalyptic number.

It is an amenable number.

6445456 is a deficient number, since it is larger than the sum of its proper divisors (6174396).

6445456 is a wasteful number, since it uses less digits than its factorization.

6445456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258 (or 4252 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

The square root of 6445456 is about 2538.7902630978. The cubic root of 6445456 is about 186.1020752393.

Adding to 6445456 its product of digits (57600), we get a palindrome (6503056).

The spelling of 6445456 in words is "six million, four hundred forty-five thousand, four hundred fifty-six".