6915 has 8 divisors (see below), whose sum is σ = 11088. Its totient is φ = 3680.

The previous prime is 6911. The next prime is 6917. The reversal of 6915 is 5196.

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

It is not a de Polignac number, because 6915 - 2² = 6911 is a prime.

6915 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6891 and 6900.

It is not an unprimeable number, because it can be changed into a prime (6911) 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, 216 + ... + 245.

It is an arithmetic number, because the mean of its divisors is an integer number (1386).

6915 is a deficient number, since it is larger than the sum of its proper divisors (4173).

6915 is a wasteful number, since it uses less digits than its factorization.

6915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469.

The product of its digits is 270, while the sum is 21.

The square root of 6915 is about 83.1564790019. The cubic root of 6915 is about 19.0515681296.

It can be divided in two parts, 691 and 5, that added together give a palindrome (696).

The spelling of 6915 in words is "six thousand, nine hundred fifteen".