6447425 has 12 divisors (see below), whose sum is σ = 8271420. Its totient is φ = 4979520.

The previous prime is 6447421. The next prime is 6447443. The reversal of 6447425 is 5247446.

It can be written as a sum of positive squares in 6 ways, for example, as 692224 + 5755201 = 832^2 + 2399^2 .

It is not a de Polignac number, because 6447425 - 2² = 6447421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6447391 and 6447400.

It is not an unprimeable number, because it can be changed into a prime (6447421) 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, 3722 + ... + 5171.

It is an arithmetic number, because the mean of its divisors is an integer number (689285).

Almost surely, 2^6447425 is an apocalyptic number.

It is an amenable number.

6447425 is a deficient number, since it is larger than the sum of its proper divisors (1823995).

6447425 is a wasteful number, since it uses less digits than its factorization.

6447425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8932 (or 8927 counting only the distinct ones).

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

The square root of 6447425 is about 2539.1780166030. The cubic root of 6447425 is about 186.1210238691.

The spelling of 6447425 in words is "six million, four hundred forty-seven thousand, four hundred twenty-five".