128900251 has 2 divisors, whose sum is σ = 128900252. Its totient is φ = 128900250.

The previous prime is 128900231. The next prime is 128900323. The reversal of 128900251 is 152009821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128900251 - 2⁹ = 128899739 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128900231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64450125 + 64450126.

It is an arithmetic number, because the mean of its divisors is an integer number (64450126).

Almost surely, 2^128900251 is an apocalyptic number.

128900251 is a deficient number, since it is larger than the sum of its proper divisors (1).

128900251 is an equidigital number, since it uses as much as digits as its factorization.

128900251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 128900251 is about 11353.4246375268. The cubic root of 128900251 is about 505.1471662061.

The spelling of 128900251 in words is "one hundred twenty-eight million, nine hundred thousand, two hundred fifty-one".