128810251 has 2 divisors, whose sum is σ = 128810252. Its totient is φ = 128810250.

The previous prime is 128810243. The next prime is 128810287. The reversal of 128810251 is 152018821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128810251 - 2³ = 128810243 is a prime.

It is not a weakly prime, because it can be changed into another prime (128810951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64405125 + 64405126.

It is an arithmetic number, because the mean of its divisors is an integer number (64405126).

Almost surely, 2^128810251 is an apocalyptic number.

128810251 is a deficient number, since it is larger than the sum of its proper divisors (1).

128810251 is an equidigital number, since it uses as much as digits as its factorization.

128810251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 128810251 is about 11349.4603836482. The cubic root of 128810251 is about 505.0295718395.

The spelling of 128810251 in words is "one hundred twenty-eight million, eight hundred ten thousand, two hundred fifty-one".