124109 has 4 divisors (see below), whose sum is σ = 125760. Its totient is φ = 122460.

The previous prime is 124097. The next prime is 124121. The reversal of 124109 is 901421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 901421 = 97 ⋅9293.

It is an interprime number because it is at equal distance from previous prime (124097) and next prime (124121).

It is a cyclic number.

It is not a de Polignac number, because 124109 - 2⁸ = 123853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707 + ... + 864.

It is an arithmetic number, because the mean of its divisors is an integer number (31440).

2¹²⁴¹⁰⁹ is an apocalyptic number.

It is an amenable number.

124109 is a deficient number, since it is larger than the sum of its proper divisors (1651).

124109 is an equidigital number, since it uses as much as digits as its factorization.

124109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 124109 is about 352.2910728361. The cubic root of 124109 is about 49.8809166081.

The spelling of 124109 in words is "one hundred twenty-four thousand, one hundred nine".