6745 has 8 divisors (see below), whose sum is σ = 8640. Its totient is φ = 5040.

The previous prime is 6737. The next prime is 6761. The reversal of 6745 is 5476.

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

It is not a de Polignac number, because 6745 - 2³ = 6737 is a prime.

It is an alternating number because its digits alternate between even and odd.

6745 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60 + ... + 130.

It is an arithmetic number, because the mean of its divisors is an integer number (1080).

2⁶⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

6745 is a deficient number, since it is larger than the sum of its proper divisors (1895).

6745 is a wasteful number, since it uses less digits than its factorization.

6745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95.

The product of its digits is 840, while the sum is 22.

The square root of 6745 is about 82.1279489577. The cubic root of 6745 is about 18.8941482215.

Adding to 6745 its reverse (5476), we get a palindrome (12221).

The spelling of 6745 in words is "six thousand, seven hundred forty-five".