6545891 has 4 divisors (see below), whose sum is σ = 7140984. Its totient is φ = 5950800.

The previous prime is 6545887. The next prime is 6545893. The reversal of 6545891 is 1985456.

6545891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6545891 - 2² = 6545887 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (6545893) 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, 297530 + ... + 297551.

It is an arithmetic number, because the mean of its divisors is an integer number (1785246).

Almost surely, 2^6545891 is an apocalyptic number.

6545891 is a deficient number, since it is larger than the sum of its proper divisors (595093).

6545891 is a wasteful number, since it uses less digits than its factorization.

6545891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595092.

The product of its digits is 43200, while the sum is 38.

The square root of 6545891 is about 2558.4938928987. The cubic root of 6545891 is about 187.0637299821.

The spelling of 6545891 in words is "six million, five hundred forty-five thousand, eight hundred ninety-one".