124120309 has 2 divisors, whose sum is σ = 124120310. Its totient is φ = 124120308.

The previous prime is 124120307. The next prime is 124120313. The reversal of 124120309 is 903021421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121220100 + 2900209 = 11010^2 + 1703^2 .

It is a cyclic number.

It is not a de Polignac number, because 124120309 - 2¹ = 124120307 is a prime.

It is a super-2 number, since 2×124120309² = 30811702212510962, which contains 22 as substring.

Together with 124120307, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 124120309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124120303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62060154 + 62060155.

It is an arithmetic number, because the mean of its divisors is an integer number (62060155).

Almost surely, 2^124120309 is an apocalyptic number.

It is an amenable number.

124120309 is a deficient number, since it is larger than the sum of its proper divisors (1).

124120309 is an equidigital number, since it uses as much as digits as its factorization.

124120309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 124120309 is about 11140.9294495567. The cubic root of 124120309 is about 498.8243163694.

The spelling of 124120309 in words is "one hundred twenty-four million, one hundred twenty thousand, three hundred nine".