124657681 has 2 divisors, whose sum is σ = 124657682. Its totient is φ = 124657680.

The previous prime is 124657661. The next prime is 124657697. The reversal of 124657681 is 186756421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121198081 + 3459600 = 11009^2 + 1860^2 .

It is a cyclic number.

It is not a de Polignac number, because 124657681 - 2¹¹ = 124655633 is a prime.

It is a super-2 number, since 2×124657681² = 31079074864595522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124657601) 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, 62328840 + 62328841.

It is an arithmetic number, because the mean of its divisors is an integer number (62328841).

Almost surely, 2^124657681 is an apocalyptic number.

It is an amenable number.

124657681 is a deficient number, since it is larger than the sum of its proper divisors (1).

124657681 is an equidigital number, since it uses as much as digits as its factorization.

124657681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 124657681 is about 11165.0204209397. The cubic root of 124657681 is about 499.5431573834.

The spelling of 124657681 in words is "one hundred twenty-four million, six hundred fifty-seven thousand, six hundred eighty-one".