Search a number
BaseRepresentation
bin1101000110001
3100012100
41220301
5203310
651013
725356
oct15061
910170
106705
115046
123a69
13308a
14262d
151ec0
hex1a31

6705 has 12 divisors (see below), whose sum is σ = 11700. Its totient is φ = 3552.

The previous prime is 6703. The next prime is 6709. The reversal of 6705 is 5076.

Added to its reverse (5076) it gives a triangular number (11781 = T153).

It can be written as a sum of positive squares in 2 ways, for example, as 1521 + 5184 = 39^2 + 72^2 .

It is not a de Polignac number, because 6705 - 21 = 6703 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30 + ... + 119.

It is an arithmetic number, because the mean of its divisors is an integer number (975).

26705 is an apocalyptic number.

It is an amenable number.

6705 is a deficient number, since it is larger than the sum of its proper divisors (4995).

6705 is a wasteful number, since it uses less digits than its factorization.

6705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 6705 is about 81.8840643837. The cubic root of 6705 is about 18.8567247054.

Adding to 6705 its reverse (5076), we get a triangular number (11781 = T153).

The spelling of 6705 in words is "six thousand, seven hundred five".

Divisors: 1 3 5 9 15 45 149 447 745 1341 2235 6705