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8045 = 51609
BaseRepresentation
bin1111101101101
3102000222
41331231
5224140
6101125
732312
oct17555
912028
108045
116054
1247a5
13387b
142d09
1525b5
hex1f6d

8045 has 4 divisors (see below), whose sum is σ = 9660. Its totient is φ = 6432.

The previous prime is 8039. The next prime is 8053. The reversal of 8045 is 5408.

It can be divided in two parts, 80 and 45, that multiplied together give a square (3600 = 602).

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5929 + 2116 = 77^2 + 46^2 .

It is a cyclic number.

It is not a de Polignac number, because 8045 - 28 = 7789 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800 + ... + 809.

It is an arithmetic number, because the mean of its divisors is an integer number (2415).

28045 is an apocalyptic number.

It is an amenable number.

8045 is a deficient number, since it is larger than the sum of its proper divisors (1615).

8045 is a wasteful number, since it uses less digits than its factorization.

8045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 8045 is about 89.6939239860. The cubic root of 8045 is about 20.0374299064.

The spelling of 8045 in words is "eight thousand, forty-five".

Divisors: 1 5 1609 8045