128750243 has 2 divisors, whose sum is σ = 128750244. Its totient is φ = 128750242.

The previous prime is 128750239. The next prime is 128750257. The reversal of 128750243 is 342057821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128750243 - 2² = 128750239 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (128752243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64375121 + 64375122.

It is an arithmetic number, because the mean of its divisors is an integer number (64375122).

Almost surely, 2^128750243 is an apocalyptic number.

128750243 is a deficient number, since it is larger than the sum of its proper divisors (1).

128750243 is an equidigital number, since it uses as much as digits as its factorization.

128750243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 128750243 is about 11346.8164257645. The cubic root of 128750243 is about 504.9511347026.

The spelling of 128750243 in words is "one hundred twenty-eight million, seven hundred fifty thousand, two hundred forty-three".