6945 has 8 divisors (see below), whose sum is σ = 11136. Its totient is φ = 3696.

The previous prime is 6917. The next prime is 6947. The reversal of 6945 is 5496.

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

It is not a de Polignac number, because 6945 - 2⁸ = 6689 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (6947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217 + ... + 246.

It is an arithmetic number, because the mean of its divisors is an integer number (1392).

2⁶⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

6945 is a deficient number, since it is larger than the sum of its proper divisors (4191).

6945 is a wasteful number, since it uses less digits than its factorization.

6945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471.

The product of its digits is 1080, while the sum is 24.

The square root of 6945 is about 83.3366666000. The cubic root of 6945 is about 19.0790794575.

The spelling of 6945 in words is "six thousand, nine hundred forty-five".