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205045 = 5231783
BaseRepresentation
bin110010000011110101
3101102021021
4302003311
523030140
64221141
71512541
oct620365
9342237
10205045
11130065
129a7b1
1372439
1454a21
1540b4a
hex320f5

205045 has 8 divisors (see below), whose sum is σ = 256896. Its totient is φ = 156816.

The previous prime is 205043. The next prime is 205063. The reversal of 205045 is 540502.

It is a happy number.

205045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 205045 - 21 = 205043 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205043) 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, 777 + ... + 1006.

It is an arithmetic number, because the mean of its divisors is an integer number (32112).

2205045 is an apocalyptic number.

It is an amenable number.

205045 is a deficient number, since it is larger than the sum of its proper divisors (51851).

205045 is a wasteful number, since it uses less digits than its factorization.

205045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 205045 is about 452.8189483668. The cubic root of 205045 is about 58.9679995001.

Adding to 205045 its reverse (540502), we get a palindrome (745547).

The spelling of 205045 in words is "two hundred five thousand, forty-five".

Divisors: 1 5 23 115 1783 8915 41009 205045