6446445 has 16 divisors (see below), whose sum is σ = 10461312. Its totient is φ = 3389120.

The previous prime is 6446437. The next prime is 6446459. The reversal of 6446445 is 5446446.

It is not a de Polignac number, because 6446445 - 2³ = 6446437 is a prime.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 1962 + ... + 4091.

It is an arithmetic number, because the mean of its divisors is an integer number (653832).

Almost surely, 2^6446445 is an apocalyptic number.

It is an amenable number.

6446445 is a deficient number, since it is larger than the sum of its proper divisors (4014867).

6446445 is a wasteful number, since it uses less digits than its factorization.

6446445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132.

The product of its digits is 46080, while the sum is 33.

The square root of 6446445 is about 2538.9850334336. The cubic root of 6446445 is about 186.1115933421. Note that the first 3 decimals are identical.

Subtracting from 6446445 its reverse (5446446), we obtain a palindrome (999999).

The spelling of 6446445 in words is "six million, four hundred forty-six thousand, four hundred forty-five".