6504971 has 6 divisors (see below), whose sum is σ = 7105572. Its totient is φ = 5905920.

The previous prime is 6504923. The next prime is 6504977. The reversal of 6504971 is 1794056.

It is a happy number.

It is not a de Polignac number, because 6504971 - 2⁶ = 6504907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6504977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8075 + ... + 8843.

It is an arithmetic number, because the mean of its divisors is an integer number (1184262).

Almost surely, 2^6504971 is an apocalyptic number.

6504971 is a deficient number, since it is larger than the sum of its proper divisors (600601).

6504971 is an frugal number, since it uses more digits than its factorization.

6504971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 6504971 is about 2550.4844637833. The cubic root of 6504971 is about 186.6731208794.

Subtracting from 6504971 its reverse (1794056), we obtain a triangular number (4710915 = T₃₀₆₉).

The spelling of 6504971 in words is "six million, five hundred four thousand, nine hundred seventy-one".