124309 has 2 divisors, whose sum is σ = 124310. Its totient is φ = 124308.

The previous prime is 124303. The next prime is 124337. The reversal of 124309 is 903421.

124309 is nontrivially palindromic in base 14.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88209 + 36100 = 297^2 + 190^2 .

It is an emirp because it is prime and its reverse (903421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124309 - 2³ = 124301 is a prime.

124309 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62154 + 62155.

It is an arithmetic number, because the mean of its divisors is an integer number (62155).

2¹²⁴³⁰⁹ is an apocalyptic number.

It is an amenable number.

124309 is a deficient number, since it is larger than the sum of its proper divisors (1).

124309 is an equidigital number, since it uses as much as digits as its factorization.

124309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 124309 is about 352.5748147557. The cubic root of 124309 is about 49.9076963723.

It can be divided in two parts, 1 and 24309, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 124309 in words is "one hundred twenty-four thousand, three hundred nine".