6543945 has 24 divisors (see below), whose sum is σ = 11711232. Its totient is φ = 3376800.

The previous prime is 6543907. The next prime is 6543947. The reversal of 6543945 is 5493456.

It is a happy number.

It is not a de Polignac number, because 6543945 - 2¹⁷ = 6412873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6543947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 951 + ... + 3740.

It is an arithmetic number, because the mean of its divisors is an integer number (487968).

Almost surely, 2^6543945 is an apocalyptic number.

It is an amenable number.

6543945 is a deficient number, since it is larger than the sum of its proper divisors (5167287).

6543945 is a wasteful number, since it uses less digits than its factorization.

6543945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4733 (or 4730 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 6543945 is about 2558.1135627646. The cubic root of 6543945 is about 187.0451910189.

The spelling of 6543945 in words is "six million, five hundred forty-three thousand, nine hundred forty-five".