105840161 has 4 divisors (see below), whose sum is σ = 120960192. Its totient is φ = 90720132.

The previous prime is 105840143. The next prime is 105840173. The reversal of 105840161 is 161048501.

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.

It is a cyclic number.

It is not a de Polignac number, because 105840161 - 2¹⁰ = 105839137 is a prime.

It is a super-2 number, since 2×105840161² = 22404279361011842, which contains 22 as substring.

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 105840161.

It is not an unprimeable number, because it can be changed into a prime (105840121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7560005 + ... + 7560018.

It is an arithmetic number, because the mean of its divisors is an integer number (30240048).

Almost surely, 2^105840161 is an apocalyptic number.

It is an amenable number.

105840161 is a deficient number, since it is larger than the sum of its proper divisors (15120031).

105840161 is an equidigital number, since it uses as much as digits as its factorization.

105840161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15120030.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 105840161 is about 10287.8647444453. The cubic root of 105840161 is about 473.0243496353.

Adding to 105840161 its reverse (161048501), we get a palindrome (266888662).

The spelling of 105840161 in words is "one hundred five million, eight hundred forty thousand, one hundred sixty-one".