124242457 has 2 divisors, whose sum is σ = 124242458. Its totient is φ = 124242456.

The previous prime is 124242439. The next prime is 124242493. The reversal of 124242457 is 754242421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94692361 + 29550096 = 9731^2 + 5436^2 .

It is an emirp because it is prime and its reverse (754242421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124242457 - 2⁷ = 124242329 is a prime.

It is not a weakly prime, because it can be changed into another prime (124242407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62121228 + 62121229.

It is an arithmetic number, because the mean of its divisors is an integer number (62121229).

Almost surely, 2^124242457 is an apocalyptic number.

It is an amenable number.

124242457 is a deficient number, since it is larger than the sum of its proper divisors (1).

124242457 is an equidigital number, since it uses as much as digits as its factorization.

124242457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 31.

The square root of 124242457 is about 11146.4100498770. The cubic root of 124242457 is about 498.9878953373.

Adding to 124242457 its reverse (754242421), we get a palindrome (878484878).

The spelling of 124242457 in words is "one hundred twenty-four million, two hundred forty-two thousand, four hundred fifty-seven".