128677441 has 2 divisors, whose sum is σ = 128677442. Its totient is φ = 128677440.

The previous prime is 128677411. The next prime is 128677459. The reversal of 128677441 is 144776821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119246400 + 9431041 = 10920^2 + 3071^2 .

It is a cyclic number.

It is not a de Polignac number, because 128677441 - 2¹⁵ = 128644673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128677394 and 128677403.

It is not a weakly prime, because it can be changed into another prime (128677411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64338720 + 64338721.

It is an arithmetic number, because the mean of its divisors is an integer number (64338721).

Almost surely, 2^128677441 is an apocalyptic number.

It is an amenable number.

128677441 is a deficient number, since it is larger than the sum of its proper divisors (1).

128677441 is an equidigital number, since it uses as much as digits as its factorization.

128677441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 40.

The square root of 128677441 is about 11343.6079357495. The cubic root of 128677441 is about 504.8559416560.

The spelling of 128677441 in words is "one hundred twenty-eight million, six hundred seventy-seven thousand, four hundred forty-one".