6543901 has 12 divisors (see below), whose sum is σ = 8198652. Its totient is φ = 5177088.

The previous prime is 6543893. The next prime is 6543907. The reversal of 6543901 is 1093456.

It can be written as a sum of positive squares in 2 ways, for example, as 1207801 + 5336100 = 1099^2 + 2310^2 .

It is not a de Polignac number, because 6543901 - 2³ = 6543893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6543901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543907) 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 11 ways as a sum of consecutive naturals, for example, 4500 + ... + 5773.

It is an arithmetic number, because the mean of its divisors is an integer number (683221).

Almost surely, 2^6543901 is an apocalyptic number.

It is an amenable number.

6543901 is a deficient number, since it is larger than the sum of its proper divisors (1654751).

6543901 is a wasteful number, since it uses less digits than its factorization.

6543901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10300 (or 10293 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 6543901 is about 2558.1049626628. The cubic root of 6543901 is about 187.0447718015.

The spelling of 6543901 in words is "six million, five hundred forty-three thousand, nine hundred one".