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118805 = 523761
BaseRepresentation
bin11101000000010101
320000222012
4131000111
512300210
62314005
71003241
oct350025
9200865
10118805
1181295
1258905
13420cb
1431421
1525305
hex1d015

118805 has 4 divisors (see below), whose sum is σ = 142572. Its totient is φ = 95040.

The previous prime is 118801. The next prime is 118819. The reversal of 118805 is 508811.

118805 = 1982 + 1992 + 2002.

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 54289 + 64516 = 233^2 + 254^2 .

It is not a de Polignac number, because 118805 - 22 = 118801 is a prime.

It is a super-2 number, since 2×1188052 = 28229256050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11876 + ... + 11885.

It is an arithmetic number, because the mean of its divisors is an integer number (35643).

2118805 is an apocalyptic number.

It is an amenable number.

118805 is a deficient number, since it is larger than the sum of its proper divisors (23767).

118805 is an equidigital number, since it uses as much as digits as its factorization.

118805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23766.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 118805 is about 344.6810119516. The cubic root of 118805 is about 49.1599658907.

Adding to 118805 its sum of digits (23), we get a triangular number (118828 = T487).

The spelling of 118805 in words is "one hundred eighteen thousand, eight hundred five".

Divisors: 1 5 23761 118805