105161291 has 4 divisors (see below), whose sum is σ = 105331800. Its totient is φ = 104990784.

The previous prime is 105161237. The next prime is 105161293. The reversal of 105161291 is 192161501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192161501 = 7 ⋅27451643.

It is a cyclic number.

It is not a de Polignac number, because 105161291 - 2⁶ = 105161227 is a prime.

It is a super-2 number, since 2×105161291² = 22117794249573362, 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 105161291.

It is not an unprimeable number, because it can be changed into a prime (105161293) 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, 84326 + ... + 85563.

It is an arithmetic number, because the mean of its divisors is an integer number (26332950).

Almost surely, 2^105161291 is an apocalyptic number.

105161291 is a deficient number, since it is larger than the sum of its proper divisors (170509).

105161291 is an equidigital number, since it uses as much as digits as its factorization.

105161291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170508.

The product of its (nonzero) digits is 540, while the sum is 26.

The square root of 105161291 is about 10254.8179408510. The cubic root of 105161291 is about 472.0108368550.

The spelling of 105161291 in words is "one hundred five million, one hundred sixty-one thousand, two hundred ninety-one".