105581123 has 2 divisors, whose sum is σ = 105581124. Its totient is φ = 105581122.

The previous prime is 105581117. The next prime is 105581143. The reversal of 105581123 is 321185501.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105581123 - 2⁴ = 105581107 is a prime.

It is a super-2 number, since 2×105581123² = 22294747067882258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105581092 and 105581101.

It is not a weakly prime, because it can be changed into another prime (105581143) 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 as a sum of consecutive naturals, namely, 52790561 + 52790562.

It is an arithmetic number, because the mean of its divisors is an integer number (52790562).

Almost surely, 2^105581123 is an apocalyptic number.

105581123 is a deficient number, since it is larger than the sum of its proper divisors (1).

105581123 is an equidigital number, since it uses as much as digits as its factorization.

105581123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 105581123 is about 10275.2675390960. The cubic root of 105581123 is about 472.6381339829.

The spelling of 105581123 in words is "one hundred five million, five hundred eighty-one thousand, one hundred twenty-three".