6543745 has 8 divisors (see below), whose sum is σ = 8456616. Its totient is φ = 4832256.

The previous prime is 6543739. The next prime is 6543767. The reversal of 6543745 is 5473456.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 788544 + 5755201 = 888^2 + 2399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6543745 - 2³ = 6543737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6543745.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50272 + ... + 50401.

It is an arithmetic number, because the mean of its divisors is an integer number (1057077).

Almost surely, 2^6543745 is an apocalyptic number.

6543745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6543745 is a deficient number, since it is larger than the sum of its proper divisors (1912871).

6543745 is a wasteful number, since it uses less digits than its factorization.

6543745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100691.

The product of its digits is 50400, while the sum is 34.

The square root of 6543745 is about 2558.0744711599. The cubic root of 6543745 is about 187.0432854701.

The spelling of 6543745 in words is "six million, five hundred forty-three thousand, seven hundred forty-five".