6444025 has 24 divisors (see below), whose sum is σ = 9535104. Its totient is φ = 4224000.

The previous prime is 6444019. The next prime is 6444041. The reversal of 6444025 is 5204446.

It is not a de Polignac number, because 6444025 - 2³ = 6444017 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian 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 23 ways as a sum of consecutive naturals, for example, 3225 + ... + 4825.

It is an arithmetic number, because the mean of its divisors is an integer number (397296).

Almost surely, 2^6444025 is an apocalyptic number.

It is an amenable number.

6444025 is a deficient number, since it is larger than the sum of its proper divisors (3091079).

6444025 is a wasteful number, since it uses less digits than its factorization.

6444025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 6444025 is about 2538.5084203130. The cubic root of 6444025 is about 186.0883016195.

It can be divided in two parts, 644 and 4025, that multiplied together give a square (2592100 = 1610²).

The spelling of 6444025 in words is "six million, four hundred forty-four thousand, twenty-five".