6443425 has 12 divisors (see below), whose sum is σ = 8460396. Its totient is φ = 4851200.

The previous prime is 6443417. The next prime is 6443429. The reversal of 6443425 is 5243446.

It can be written as a sum of positive squares in 6 ways, for example, as 7056 + 6436369 = 84^2 + 2537^2 .

It is not a de Polignac number, because 6443425 - 2³ = 6443417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6443393 and 6443402.

It is not an unprimeable number, because it can be changed into a prime (6443429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7156 + ... + 8005.

It is an arithmetic number, because the mean of its divisors is an integer number (705033).

Almost surely, 2^6443425 is an apocalyptic number.

It is an amenable number.

6443425 is a deficient number, since it is larger than the sum of its proper divisors (2016971).

6443425 is a wasteful number, since it uses less digits than its factorization.

6443425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15188 (or 15183 counting only the distinct ones).

The product of its digits is 11520, while the sum is 28.

The square root of 6443425 is about 2538.3902379264. The cubic root of 6443425 is about 186.0825259102.

The spelling of 6443425 in words is "six million, four hundred forty-three thousand, four hundred twenty-five".