6442947 has 24 divisors (see below), whose sum is σ = 10982400. Its totient is φ = 3561840.

The previous prime is 6442939. The next prime is 6442979. The reversal of 6442947 is 7492446.

6442947 is a `hidden beast` number, since 644 + 2 + 9 + 4 + 7 = 666.

It is not a de Polignac number, because 6442947 - 2³ = 6442939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6442937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304 + ... + 3602.

It is an arithmetic number, because the mean of its divisors is an integer number (457600).

Almost surely, 2^6442947 is an apocalyptic number.

6442947 is a deficient number, since it is larger than the sum of its proper divisors (4539453).

6442947 is a wasteful number, since it uses less digits than its factorization.

6442947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343 (or 3340 counting only the distinct ones).

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

The square root of 6442947 is about 2538.2960820204. The cubic root of 6442947 is about 186.0779243384.

The spelling of 6442947 in words is "six million, four hundred forty-two thousand, nine hundred forty-seven".