6445256 has 16 divisors (see below), whose sum is σ = 12721200. Its totient is φ = 3052944.

The previous prime is 6445247. The next prime is 6445259. The reversal of 6445256 is 6525446.

It is not an unprimeable number, because it can be changed into a prime (6445259) 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, 21050 + ... + 21353.

It is an arithmetic number, because the mean of its divisors is an integer number (795075).

Almost surely, 2^6445256 is an apocalyptic number.

It is an amenable number.

6445256 is a deficient number, since it is larger than the sum of its proper divisors (6275944).

6445256 is a wasteful number, since it uses less digits than its factorization.

6445256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42428 (or 42424 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 6445256 is about 2538.7508739536. The cubic root of 6445256 is about 186.1001503277.

The spelling of 6445256 in words is "six million, four hundred forty-five thousand, two hundred fifty-six".