124977121 has 2 divisors, whose sum is σ = 124977122. Its totient is φ = 124977120.

The previous prime is 124977119. The next prime is 124977133. The reversal of 124977121 is 121779421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124634896 + 342225 = 11164^2 + 585^2 .

It is an emirp because it is prime and its reverse (121779421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124977121 - 2¹ = 124977119 is a prime.

Together with 124977119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (124977191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62488560 + 62488561.

It is an arithmetic number, because the mean of its divisors is an integer number (62488561).

Almost surely, 2^124977121 is an apocalyptic number.

It is an amenable number.

124977121 is a deficient number, since it is larger than the sum of its proper divisors (1).

124977121 is an equidigital number, since it uses as much as digits as its factorization.

124977121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 34.

The square root of 124977121 is about 11179.3166606908. The cubic root of 124977121 is about 499.9694928053.

The spelling of 124977121 in words is "one hundred twenty-four million, nine hundred seventy-seven thousand, one hundred twenty-one".