6485891 has 4 divisors (see below), whose sum is σ = 6867432. Its totient is φ = 6104352.

The previous prime is 6485881. The next prime is 6485923. The reversal of 6485891 is 1985846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1985846 = 2 ⋅992923.

It is a cyclic number.

It is not a de Polignac number, because 6485891 - 2¹⁸ = 6223747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6485881) 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, 190745 + ... + 190778.

It is an arithmetic number, because the mean of its divisors is an integer number (1716858).

Almost surely, 2^6485891 is an apocalyptic number.

6485891 is a deficient number, since it is larger than the sum of its proper divisors (381541).

6485891 is a wasteful number, since it uses less digits than its factorization.

6485891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381540.

The product of its digits is 69120, while the sum is 41.

The square root of 6485891 is about 2546.7412510893. The cubic root of 6485891 is about 186.4904292539.

The spelling of 6485891 in words is "six million, four hundred eighty-five thousand, eight hundred ninety-one".