124209 has 12 divisors (see below), whose sum is σ = 184756. Its totient is φ = 80352.

The previous prime is 124199. The next prime is 124213. The reversal of 124209 is 902421.

124209 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 2 ways, for example, as 91809 + 32400 = 303^2 + 180^2 .

It is not a de Polignac number, because 124209 - 2⁴ = 124193 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124191 and 124200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147 + ... + 519.

2¹²⁴²⁰⁹ is an apocalyptic number.

It is an amenable number.

124209 is a deficient number, since it is larger than the sum of its proper divisors (60547).

124209 is a wasteful number, since it uses less digits than its factorization.

124209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 124209 is about 352.4329723508. The cubic root of 124209 is about 49.8943100836.

It can be divided in two parts, 124 and 209, that added together give a palindrome (333).

The spelling of 124209 in words is "one hundred twenty-four thousand, two hundred nine".