124105 has 4 divisors (see below), whose sum is σ = 148932. Its totient is φ = 99280.

The previous prime is 124097. The next prime is 124121. The reversal of 124105 is 501421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501421 = 389 ⋅1289.

It can be written as a sum of positive squares in 2 ways, for example, as 29241 + 94864 = 171^2 + 308^2 .

It is not a de Polignac number, because 124105 - 2³ = 124097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12406 + ... + 12415.

It is an arithmetic number, because the mean of its divisors is an integer number (37233).

2¹²⁴¹⁰⁵ is an apocalyptic number.

It is an amenable number.

124105 is a deficient number, since it is larger than the sum of its proper divisors (24827).

124105 is an equidigital number, since it uses as much as digits as its factorization.

124105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24826.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 124105 is about 352.2853956666. The cubic root of 124105 is about 49.8803807194.

Adding to 124105 its reverse (501421), we get a palindrome (625526).

The spelling of 124105 in words is "one hundred twenty-four thousand, one hundred five".