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105443 = 138111

105443 has 4 divisors (see below), whose sum is σ = 113568. Its totient is φ = 97320.

The previous prime is 105437. The next prime is 105449. The reversal of 105443 is 344501.

Adding to 105443 its reverse (344501), we get a palindrome (449944).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344501 = 595839.

It is an interprime number because it is at equal distance from previous prime (105437) and next prime (105449).

It is a cyclic number.

It is not a de Polignac number, because 105443 - 26 = 105379 is a prime.

It is a super-2 number, since 2×1054432 = 22236452498, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 105443.

It is not an unprimeable number, because it can be changed into a prime (105449) 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, 4043 + ... + 4068.

It is an arithmetic number, because the mean of its divisors is an integer number (28392).

2105443 is an apocalyptic number.

105443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

105443 is a deficient number, since it is larger than the sum of its proper divisors (8125).

105443 is an equidigital number, since it uses as much as digits as its factorization.

105443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 105443 is about 324.7198792806. The cubic root of 105443 is about 47.2431939657.

The spelling of 105443 in words is "one hundred five thousand, four hundred forty-three".

Divisors: 1 13 8111 105443