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BaseRepresentation
bin10001000101001
3102222220
42020221
5234440
6104253
734332
oct21051
912886
108745
116630
125089
133c99
143289
1528d0
hex2229

8745 has 16 divisors (see below), whose sum is σ = 15552. Its totient is φ = 4160.

The previous prime is 8741. The next prime is 8747. The reversal of 8745 is 5478.

8745 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8745 - 22 = 8741 is a prime.

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

8745 is strictly pandigital in base 6.

It is a Curzon number.

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (8741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139 + ... + 191.

It is an arithmetic number, because the mean of its divisors is an integer number (972).

28745 is an apocalyptic number.

It is an amenable number.

8745 is a deficient number, since it is larger than the sum of its proper divisors (6807).

8745 is a wasteful number, since it uses less digits than its factorization.

8745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72.

The product of its digits is 1120, while the sum is 24.

The square root of 8745 is about 93.5147047260. The cubic root of 8745 is about 20.6025007176.

The spelling of 8745 in words is "eight thousand, seven hundred forty-five".