6444725 has 18 divisors (see below), whose sum is σ = 9297954. Its totient is φ = 4418400.

The previous prime is 6444719. The next prime is 6444727. The reversal of 6444725 is 5274446.

It can be written as a sum of positive squares in 3 ways, for example, as 879844 + 5564881 = 938^2 + 2359^2 .

It is not a de Polignac number, because 6444725 - 2²² = 2250421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6444691 and 6444700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444727) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1406 + ... + 3855.

It is an arithmetic number, because the mean of its divisors is an integer number (516553).

Almost surely, 2^6444725 is an apocalyptic number.

It is an amenable number.

6444725 is a deficient number, since it is larger than the sum of its proper divisors (2853229).

6444725 is a wasteful number, since it uses less digits than its factorization.

6444725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285 (or 5273 counting only the distinct ones).

The product of its digits is 26880, while the sum is 32.

The square root of 6444725 is about 2538.6462928104. The cubic root of 6444725 is about 186.0950394940.

The spelling of 6444725 in words is "six million, four hundred forty-four thousand, seven hundred twenty-five".