128051851 has 2 divisors, whose sum is σ = 128051852. Its totient is φ = 128051850.

The previous prime is 128051839. The next prime is 128051873. The reversal of 128051851 is 158150821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128051851 - 2⁷ = 128051723 is a prime.

It is not a weakly prime, because it can be changed into another prime (128051881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64025925 + 64025926.

It is an arithmetic number, because the mean of its divisors is an integer number (64025926).

Almost surely, 2^128051851 is an apocalyptic number.

128051851 is a deficient number, since it is larger than the sum of its proper divisors (1).

128051851 is an equidigital number, since it uses as much as digits as its factorization.

128051851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 31.

The square root of 128051851 is about 11315.9997790739. Note that the first 3 decimals coincide. The cubic root of 128051851 is about 504.0364609446.

The spelling of 128051851 in words is "one hundred twenty-eight million, fifty-one thousand, eight hundred fifty-one".