124221257 has 2 divisors, whose sum is σ = 124221258. Its totient is φ = 124221256.

The previous prime is 124221211. The next prime is 124221271. The reversal of 124221257 is 752122421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102839881 + 21381376 = 10141^2 + 4624^2 .

It is a cyclic number.

It is not a de Polignac number, because 124221257 - 2¹² = 124217161 is a prime.

It is not a weakly prime, because it can be changed into another prime (124221277) 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, 62110628 + 62110629.

It is an arithmetic number, because the mean of its divisors is an integer number (62110629).

Almost surely, 2^124221257 is an apocalyptic number.

It is an amenable number.

124221257 is a deficient number, since it is larger than the sum of its proper divisors (1).

124221257 is an equidigital number, since it uses as much as digits as its factorization.

124221257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 26.

The square root of 124221257 is about 11145.4590304751. The cubic root of 124221257 is about 498.9595122725.

Adding to 124221257 its reverse (752122421), we get a palindrome (876343678).

The spelling of 124221257 in words is "one hundred twenty-four million, two hundred twenty-one thousand, two hundred fifty-seven".