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190105 = 5193197
BaseRepresentation
bin101110011010011001
3100122202221
4232122121
522040410
64024041
71421146
oct563231
9318687
10190105
1111a913
1292021
13686b6
144d3cd
153b4da
hex2e699

190105 has 8 divisors (see below), whose sum is σ = 230472. Its totient is φ = 150528.

The previous prime is 190097. The next prime is 190121. The reversal of 190105 is 501091.

Adding to 190105 its reverse (501091), we get a palindrome (691196).

It can be written as a sum of positive squares in 4 ways, for example, as 44944 + 145161 = 212^2 + 381^2 .

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 190105 - 23 = 190097 is a prime.

It is a super-3 number, since 3×1901053 = 20611133356222875, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867 + ... + 1063.

It is an arithmetic number, because the mean of its divisors is an integer number (28809).

2190105 is an apocalyptic number.

It is an amenable number.

190105 is a deficient number, since it is larger than the sum of its proper divisors (40367).

190105 is a wasteful number, since it uses less digits than its factorization.

190105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 190105 is about 436.0103209788. The cubic root of 190105 is about 57.4995589128.

The spelling of 190105 in words is "one hundred ninety thousand, one hundred five".

Divisors: 1 5 193 197 965 985 38021 190105