124780661 has 2 divisors, whose sum is σ = 124780662. Its totient is φ = 124780660.

The previous prime is 124780639. The next prime is 124780679. The reversal of 124780661 is 166087421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75359761 + 49420900 = 8681^2 + 7030^2 .

It is a cyclic number.

It is not a de Polignac number, because 124780661 - 2²⁶ = 57671797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124780631) 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, 62390330 + 62390331.

It is an arithmetic number, because the mean of its divisors is an integer number (62390331).

Almost surely, 2^124780661 is an apocalyptic number.

It is an amenable number.

124780661 is a deficient number, since it is larger than the sum of its proper divisors (1).

124780661 is an equidigital number, since it uses as much as digits as its factorization.

124780661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 124780661 is about 11170.5264423840. The cubic root of 124780661 is about 499.7073767767.

The spelling of 124780661 in words is "one hundred twenty-four million, seven hundred eighty thousand, six hundred sixty-one".