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26945 = 517317
BaseRepresentation
bin110100101000001
31100221222
412211001
51330240
6324425
7141362
oct64501
940858
1026945
1119276
1213715
13c359
149b69
157eb5
hex6941

26945 has 8 divisors (see below), whose sum is σ = 34344. Its totient is φ = 20224.

The previous prime is 26927. The next prime is 26947. The reversal of 26945 is 54962.

It can be written as a sum of positive squares in 4 ways, for example, as 1024 + 25921 = 32^2 + 161^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 26945 - 26 = 26881 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26947) 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, 74 + ... + 243.

It is an arithmetic number, because the mean of its divisors is an integer number (4293).

226945 is an apocalyptic number.

It is an amenable number.

26945 is a deficient number, since it is larger than the sum of its proper divisors (7399).

26945 is a wasteful number, since it uses less digits than its factorization.

26945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339.

The product of its digits is 2160, while the sum is 26.

The square root of 26945 is about 164.1493222648. The cubic root of 26945 is about 29.9796157822.

The spelling of 26945 in words is "twenty-six thousand, nine hundred forty-five".

Divisors: 1 5 17 85 317 1585 5389 26945