47105 has 4 divisors (see below), whose sum is σ = 56532. Its totient is φ = 37680.

The previous prime is 47093. The next prime is 47111. The reversal of 47105 is 50174.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50174 = 2 ⋅25087.

It can be written as a sum of positive squares in 2 ways, for example, as 16129 + 30976 = 127^2 + 176^2 .

It is not a de Polignac number, because 47105 - 2⁶ = 47041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4706 + ... + 4715.

It is an arithmetic number, because the mean of its divisors is an integer number (14133).

It is a Proth number, since it is equal to 23 ⋅ 2¹¹ + 1 and 23 < 2¹¹.

2⁴⁷¹⁰⁵ is an apocalyptic number.

It is an amenable number.

47105 is a deficient number, since it is larger than the sum of its proper divisors (9427).

47105 is an equidigital number, since it uses as much as digits as its factorization.

47105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 47105 is about 217.0368632283. The cubic root of 47105 is about 36.1151150502.

Adding to 47105 its reverse (50174), we get a palindrome (97279).

The spelling of 47105 in words is "forty-seven thousand, one hundred five".