6447225 has 48 divisors (see below), whose sum is σ = 11427840. Its totient is φ = 3201600.

The previous prime is 6447197. The next prime is 6447229. The reversal of 6447225 is 5227446.

It is not a de Polignac number, because 6447225 - 2¹¹ = 6445177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6447192 and 6447201.

It is not an unprimeable number, because it can be changed into a prime (6447229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109246 + ... + 109304.

It is an arithmetic number, because the mean of its divisors is an integer number (238080).

Almost surely, 2^6447225 is an apocalyptic number.

It is an amenable number.

6447225 is a deficient number, since it is larger than the sum of its proper divisors (4980615).

6447225 is a wasteful number, since it uses less digits than its factorization.

6447225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 145 counting only the distinct ones).

The product of its digits is 13440, while the sum is 30.

The square root of 6447225 is about 2539.1386334740. The cubic root of 6447225 is about 186.1190993494.

The spelling of 6447225 in words is "six million, four hundred forty-seven thousand, two hundred twenty-five".