128051251 has 2 divisors, whose sum is σ = 128051252. Its totient is φ = 128051250.

The previous prime is 128051243. The next prime is 128051267. The reversal of 128051251 is 152150821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128051251 - 2³ = 128051243 is a prime.

It is not a weakly prime, because it can be changed into another prime (128051201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64025625 + 64025626.

It is an arithmetic number, because the mean of its divisors is an integer number (64025626).

Almost surely, 2^128051251 is an apocalyptic number.

128051251 is a deficient number, since it is larger than the sum of its proper divisors (1).

128051251 is an equidigital number, since it uses as much as digits as its factorization.

128051251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 128051251 is about 11315.9732679076. The cubic root of 128051251 is about 504.0356737053.

The spelling of 128051251 in words is "one hundred twenty-eight million, fifty-one thousand, two hundred fifty-one".