105181 has 4 divisors (see below), whose sum is σ = 106272. Its totient is φ = 104092.

The previous prime is 105173. The next prime is 105199. The reversal of 105181 is 181501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 105181 - 2³ = 105173 is a prime.

It is a super-2 number, since 2×105181² = 22126085522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385 + ... + 598.

It is an arithmetic number, because the mean of its divisors is an integer number (26568).

2¹⁰⁵¹⁸¹ is an apocalyptic number.

It is an amenable number.

105181 is a deficient number, since it is larger than the sum of its proper divisors (1091).

105181 is an equidigital number, since it uses as much as digits as its factorization.

105181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 105181 is about 324.3162037272. The cubic root of 105181 is about 47.2040322611.

Adding to 105181 its reverse (181501), we get a palindrome (286682).

The spelling of 105181 in words is "one hundred five thousand, one hundred eighty-one".