6447249 has 16 divisors (see below), whose sum is σ = 9662400. Its totient is φ = 4248288.

The previous prime is 6447239. The next prime is 6447253. The reversal of 6447249 is 9427446.

6447249 is a `hidden beast` number, since 644 + 7 + 2 + 4 + 9 = 666.

It is not a de Polignac number, because 6447249 - 2⁷ = 6447121 is a prime.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 1062 + ... + 3744.

It is an arithmetic number, because the mean of its divisors is an integer number (603900).

Almost surely, 2^6447249 is an apocalyptic number.

It is an amenable number.

6447249 is a deficient number, since it is larger than the sum of its proper divisors (3215151).

6447249 is a wasteful number, since it uses less digits than its factorization.

6447249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2775 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 6447249 is about 2539.1433594817. The cubic root of 6447249 is about 186.1193302938.

The spelling of 6447249 in words is "six million, four hundred forty-seven thousand, two hundred forty-nine".