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103205 = 520641
BaseRepresentation
bin11001001100100101
312020120102
4121030211
511300310
62113445
7606614
oct311445
9166512
10103205
11705a3
124b885
1337c8b
142987b
15208a5
hex19325

103205 has 4 divisors (see below), whose sum is σ = 123852. Its totient is φ = 82560.

The previous prime is 103183. The next prime is 103217. The reversal of 103205 is 502301.

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 25921 + 77284 = 161^2 + 278^2 .

It is not a de Polignac number, because 103205 - 26 = 103141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 103205.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10316 + ... + 10325.

It is an arithmetic number, because the mean of its divisors is an integer number (30963).

2103205 is an apocalyptic number.

It is an amenable number.

103205 is a deficient number, since it is larger than the sum of its proper divisors (20647).

103205 is an equidigital number, since it uses as much as digits as its factorization.

103205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20646.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 103205 is about 321.2553501500. The cubic root of 103205 is about 46.9065594879.

Adding to 103205 its reverse (502301), we get a palindrome (605506).

It can be divided in two parts, 103 and 205, that multiplied together give a triangular number (21115 = T205).

The spelling of 103205 in words is "one hundred three thousand, two hundred five".

Divisors: 1 5 20641 103205