128812741 has 2 divisors, whose sum is σ = 128812742. Its totient is φ = 128812740.

The previous prime is 128812721. The next prime is 128812771. The reversal of 128812741 is 147218821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105144516 + 23668225 = 10254^2 + 4865^2 .

It is a cyclic number.

It is not a de Polignac number, because 128812741 - 2⁵ = 128812709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128812697 and 128812706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128812721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64406370 + 64406371.

It is an arithmetic number, because the mean of its divisors is an integer number (64406371).

Almost surely, 2^128812741 is an apocalyptic number.

It is an amenable number.

128812741 is a deficient number, since it is larger than the sum of its proper divisors (1).

128812741 is an equidigital number, since it uses as much as digits as its factorization.

128812741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 34.

The square root of 128812741 is about 11349.5700799634. The cubic root of 128812741 is about 505.0328260203.

The spelling of 128812741 in words is "one hundred twenty-eight million, eight hundred twelve thousand, seven hundred forty-one".