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143105 = 528621
BaseRepresentation
bin100010111100000001
321021022012
4202330001
514034410
63022305
71134134
oct427401
9237265
10143105
1198576
126a995
13501a1
143a21b
152c605
hex22f01

143105 has 4 divisors (see below), whose sum is σ = 171732. Its totient is φ = 114480.

The previous prime is 143093. The next prime is 143107. The reversal of 143105 is 501341.

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 18496 + 124609 = 136^2 + 353^2 .

It is not a de Polignac number, because 143105 - 216 = 77569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143105.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143105.

It is not an unprimeable number, because it can be changed into a prime (143107) 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, 14306 + ... + 14315.

It is an arithmetic number, because the mean of its divisors is an integer number (42933).

2143105 is an apocalyptic number.

It is an amenable number.

143105 is a deficient number, since it is larger than the sum of its proper divisors (28627).

143105 is an equidigital number, since it uses as much as digits as its factorization.

143105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28626.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 143105 is about 378.2922150930. The cubic root of 143105 is about 52.3060112249.

Adding to 143105 its reverse (501341), we get a palindrome (644446).

The spelling of 143105 in words is "one hundred forty-three thousand, one hundred five".

Divisors: 1 5 28621 143105