105142181 has 8 divisors (see below), whose sum is σ = 113250720. Its totient is φ = 97291152.

The previous prime is 105142153. The next prime is 105142187. The reversal of 105142181 is 181241501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105142181 is a prime.

It is a super-2 number, since 2×105142181² = 22109756450873522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105142187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63530 + ... + 65163.

It is an arithmetic number, because the mean of its divisors is an integer number (14156340).

Almost surely, 2^105142181 is an apocalyptic number.

It is an amenable number.

105142181 is a deficient number, since it is larger than the sum of its proper divisors (8108539).

105142181 is a wasteful number, since it uses less digits than its factorization.

105142181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128755.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 105142181 is about 10253.8861413612. The cubic root of 105142181 is about 471.9822437182.

Adding to 105142181 its reverse (181241501), we get a palindrome (286383682).

The spelling of 105142181 in words is "one hundred five million, one hundred forty-two thousand, one hundred eighty-one".