128504801 has 2 divisors, whose sum is σ = 128504802. Its totient is φ = 128504800.

The previous prime is 128504791. The next prime is 128504851. The reversal of 128504801 is 108405821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65286400 + 63218401 = 8080^2 + 7951^2 .

It is a cyclic number.

It is not a de Polignac number, because 128504801 - 2¹⁸ = 128242657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (128504851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64252400 + 64252401.

It is an arithmetic number, because the mean of its divisors is an integer number (64252401).

Almost surely, 2^128504801 is an apocalyptic number.

It is an amenable number.

128504801 is a deficient number, since it is larger than the sum of its proper divisors (1).

128504801 is an equidigital number, since it uses as much as digits as its factorization.

128504801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 128504801 is about 11335.9958098087. The cubic root of 128504801 is about 504.6300607329.

The spelling of 128504801 in words is "one hundred twenty-eight million, five hundred four thousand, eight hundred one".