6446871 has 40 divisors (see below), whose sum is σ = 10454400. Its totient is φ = 3946320.

The previous prime is 6446863. The next prime is 6446929. The reversal of 6446871 is 1786446.

6446871 is a `hidden beast` number, since 644 + 6 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 6446871 - 2³ = 6446863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 90766 + ... + 90836.

It is an arithmetic number, because the mean of its divisors is an integer number (261360).

Almost surely, 2^6446871 is an apocalyptic number.

6446871 is a deficient number, since it is larger than the sum of its proper divisors (4007529).

6446871 is a wasteful number, since it uses less digits than its factorization.

6446871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 152 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 6446871 is about 2539.0689238380. The cubic root of 6446871 is about 186.1156928519.

The spelling of 6446871 in words is "six million, four hundred forty-six thousand, eight hundred seventy-one".