6725 has 6 divisors (see below), whose sum is σ = 8370. Its totient is φ = 5360.

The previous prime is 6719. The next prime is 6733. The reversal of 6725 is 5276.

It is a Cunningham number, because it is equal to 82²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 6724 = 1^2 + 82^2 .

It is not a de Polignac number, because 6725 - 2⁴ = 6709 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6697 and 6706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110 + ... + 159.

It is an arithmetic number, because the mean of its divisors is an integer number (1395).

2⁶⁷²⁵ is an apocalyptic number.

It is an amenable number.

6725 is a deficient number, since it is larger than the sum of its proper divisors (1645).

6725 is a wasteful number, since it uses less digits than its factorization.

6725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 274 counting only the distinct ones).

The product of its digits is 420, while the sum is 20.

The square root of 6725 is about 82.0060973343. The cubic root of 6725 is about 18.8754550129.

The spelling of 6725 in words is "six thousand, seven hundred twenty-five".