124947649 has 2 divisors, whose sum is σ = 124947650. Its totient is φ = 124947648.

The previous prime is 124947617. The next prime is 124947653. The reversal of 124947649 is 946749421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119749249 + 5198400 = 10943^2 + 2280^2 .

It is an emirp because it is prime and its reverse (946749421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124947649 - 2⁵ = 124947617 is a prime.

It is a super-2 number, since 2×124947649² = 31223829981254402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 124947599 and 124947608.

It is not a weakly prime, because it can be changed into another prime (124947679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62473824 + 62473825.

It is an arithmetic number, because the mean of its divisors is an integer number (62473825).

Almost surely, 2^124947649 is an apocalyptic number.

It is an amenable number.

124947649 is a deficient number, since it is larger than the sum of its proper divisors (1).

124947649 is an equidigital number, since it uses as much as digits as its factorization.

124947649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 124947649 is about 11177.9984344247. The cubic root of 124947649 is about 499.9301889199.

The spelling of 124947649 in words is "one hundred twenty-four million, nine hundred forty-seven thousand, six hundred forty-nine".