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BaseRepresentation
bin11000111011000001
312012000210
4120323001
511231311
62104333
7603420
oct307301
9165023
10102081
116a771
124b0a9
1337605
14292b7
15203a6
hex18ec1

102081 has 8 divisors (see below), whose sum is σ = 155584. Its totient is φ = 58320.

The previous prime is 102079. The next prime is 102101. The reversal of 102081 is 180201.

It is a happy number.

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

It is not a de Polignac number, because 102081 - 21 = 102079 is a prime.

It is a super-2 number, since 2×1020812 = 20841061122, which contains 22 as substring.

It is the 320-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102001) by changing a digit.

It is a nontrivial repunit in base 319.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2410 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (19448).

2102081 is an apocalyptic number.

It is an amenable number.

102081 is a deficient number, since it is larger than the sum of its proper divisors (53503).

102081 is an equidigital number, since it uses as much as digits as its factorization.

102081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 102081 is about 319.5011737068. The cubic root of 102081 is about 46.7356519401.

Adding to 102081 its reverse (180201), we get a palindrome (282282).

The spelling of 102081 in words is "one hundred two thousand, eighty-one".

Divisors: 1 3 7 21 4861 14583 34027 102081