124261649 has 2 divisors, whose sum is σ = 124261650. Its totient is φ = 124261648.

The previous prime is 124261639. The next prime is 124261681. The reversal of 124261649 is 946162421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97377424 + 26884225 = 9868^2 + 5185^2 .

It is a cyclic number.

It is not a de Polignac number, because 124261649 - 2⁴ = 124261633 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (124261639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62130824 + 62130825.

It is an arithmetic number, because the mean of its divisors is an integer number (62130825).

Almost surely, 2^124261649 is an apocalyptic number.

It is an amenable number.

124261649 is a deficient number, since it is larger than the sum of its proper divisors (1).

124261649 is an equidigital number, since it uses as much as digits as its factorization.

124261649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 124261649 is about 11147.2709216202. The cubic root of 124261649 is about 499.0135872595.

The spelling of 124261649 in words is "one hundred twenty-four million, two hundred sixty-one thousand, six hundred forty-nine".