6504161 has 4 divisors (see below), whose sum is σ = 6510000. Its totient is φ = 6498324.

The previous prime is 6504143. The next prime is 6504181. The reversal of 6504161 is 1614056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6504161 - 2¹⁰ = 6503137 is a prime.

It is a super-3 number, since 3×6504161³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6504131) 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 3 ways as a sum of consecutive naturals, for example, 671 + ... + 3668.

It is an arithmetic number, because the mean of its divisors is an integer number (1627500).

Almost surely, 2^6504161 is an apocalyptic number.

It is an amenable number.

6504161 is a deficient number, since it is larger than the sum of its proper divisors (5839).

6504161 is a wasteful number, since it uses less digits than its factorization.

6504161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5838.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 6504161 is about 2550.3256654788. The cubic root of 6504161 is about 186.6653723691.

The spelling of 6504161 in words is "six million, five hundred four thousand, one hundred sixty-one".