124671221 has 2 divisors, whose sum is σ = 124671222. Its totient is φ = 124671220.

The previous prime is 124671199. The next prime is 124671227. The reversal of 124671221 is 122176421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118570321 + 6100900 = 10889^2 + 2470^2 .

It is an emirp because it is prime and its reverse (122176421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124671221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124671227) 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, 62335610 + 62335611.

It is an arithmetic number, because the mean of its divisors is an integer number (62335611).

Almost surely, 2^124671221 is an apocalyptic number.

It is an amenable number.

124671221 is a deficient number, since it is larger than the sum of its proper divisors (1).

124671221 is an equidigital number, since it uses as much as digits as its factorization.

124671221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 124671221 is about 11165.6267625244. The cubic root of 124671221 is about 499.5612430974.

The spelling of 124671221 in words is "one hundred twenty-four million, six hundred seventy-one thousand, two hundred twenty-one".