6471945 has 12 divisors (see below), whose sum is σ = 11218116. Its totient is φ = 3451680.

The previous prime is 6471919. The next prime is 6471953. The reversal of 6471945 is 5491746.

6471945 is a `hidden beast` number, since 647 + 1 + 9 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2322576 + 4149369 = 1524^2 + 2037^2 .

It is not a de Polignac number, because 6471945 - 2⁹ = 6471433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71866 + ... + 71955.

It is an arithmetic number, because the mean of its divisors is an integer number (934843).

Almost surely, 2^6471945 is an apocalyptic number.

It is an amenable number.

6471945 is a deficient number, since it is larger than the sum of its proper divisors (4746171).

6471945 is a wasteful number, since it uses less digits than its factorization.

6471945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143832 (or 143829 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 6471945 is about 2544.0017688673. The cubic root of 6471945 is about 186.3566690742.

The spelling of 6471945 in words is "six million, four hundred seventy-one thousand, nine hundred forty-five".