6443625 has 16 divisors (see below), whose sum is σ = 10722816. Its totient is φ = 3436400.

The previous prime is 6443621. The next prime is 6443639. The reversal of 6443625 is 5263446.

It is not a de Polignac number, because 6443625 - 2² = 6443621 is a prime.

6443625 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6443592 and 6443601.

It is not an unprimeable number, because it can be changed into a prime (6443621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8217 + ... + 8966.

It is an arithmetic number, because the mean of its divisors is an integer number (670176).

Almost surely, 2^6443625 is an apocalyptic number.

It is an amenable number.

6443625 is a deficient number, since it is larger than the sum of its proper divisors (4279191).

6443625 is a wasteful number, since it uses less digits than its factorization.

6443625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17201 (or 17191 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 6443625 is about 2538.4296326666. The cubic root of 6443625 is about 186.0844511865.

The spelling of 6443625 in words is "six million, four hundred forty-three thousand, six hundred twenty-five".