124238561 has 2 divisors, whose sum is σ = 124238562. Its totient is φ = 124238560.

The previous prime is 124238557. The next prime is 124238579. The reversal of 124238561 is 165832421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91107025 + 33131536 = 9545^2 + 5756^2 .

It is a cyclic number.

It is not a de Polignac number, because 124238561 - 2² = 124238557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124238501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62119280 + 62119281.

It is an arithmetic number, because the mean of its divisors is an integer number (62119281).

Almost surely, 2^124238561 is an apocalyptic number.

It is an amenable number.

124238561 is a deficient number, since it is larger than the sum of its proper divisors (1).

124238561 is an equidigital number, since it uses as much as digits as its factorization.

124238561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 124238561 is about 11146.2352837180. The cubic root of 124238561 is about 498.9826795219.

The spelling of 124238561 in words is "one hundred twenty-four million, two hundred thirty-eight thousand, five hundred sixty-one".