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87105 = 355807
BaseRepresentation
bin10101010001000001
311102111010
4111101001
510241410
61511133
7511644
oct252101
9142433
1087105
115a497
12424a9
1330855
1423a5b
151ac20
hex15441

87105 has 8 divisors (see below), whose sum is σ = 139392. Its totient is φ = 46448.

The previous prime is 87103. The next prime is 87107. The reversal of 87105 is 50178.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87103) and next prime (87107).

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 87105 - 21 = 87103 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (87103) 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, 2889 + ... + 2918.

It is an arithmetic number, because the mean of its divisors is an integer number (17424).

287105 is an apocalyptic number.

It is an amenable number.

87105 is a deficient number, since it is larger than the sum of its proper divisors (52287).

87105 is a wasteful number, since it uses less digits than its factorization.

87105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 87105 is about 295.1355620728. The cubic root of 87105 is about 44.3282951040.

The spelling of 87105 in words is "eighty-seven thousand, one hundred five".

Divisors: 1 3 5 15 5807 17421 29035 87105