124649761 has 2 divisors, whose sum is σ = 124649762. Its totient is φ = 124649760.

The previous prime is 124649731. The next prime is 124649803. The reversal of 124649761 is 167946421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85211361 + 39438400 = 9231^2 + 6280^2 .

It is a cyclic number.

It is not a de Polignac number, because 124649761 - 2⁹ = 124649249 is a prime.

It is not a weakly prime, because it can be changed into another prime (124649731) 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, 62324880 + 62324881.

It is an arithmetic number, because the mean of its divisors is an integer number (62324881).

Almost surely, 2^124649761 is an apocalyptic number.

It is an amenable number.

124649761 is a deficient number, since it is larger than the sum of its proper divisors (1).

124649761 is an equidigital number, since it uses as much as digits as its factorization.

124649761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 124649761 is about 11164.6657361517. The cubic root of 124649761 is about 499.5325778359.

The spelling of 124649761 in words is "one hundred twenty-four million, six hundred forty-nine thousand, seven hundred sixty-one".