128597243 has 2 divisors, whose sum is σ = 128597244. Its totient is φ = 128597242.

The previous prime is 128597221. The next prime is 128597267. The reversal of 128597243 is 342795821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128597243 - 2⁶ = 128597179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128597243.

It is not a weakly prime, because it can be changed into another prime (128597213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64298621 + 64298622.

It is an arithmetic number, because the mean of its divisors is an integer number (64298622).

Almost surely, 2^128597243 is an apocalyptic number.

128597243 is a deficient number, since it is larger than the sum of its proper divisors (1).

128597243 is an equidigital number, since it uses as much as digits as its factorization.

128597243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 128597243 is about 11340.0724424494. The cubic root of 128597243 is about 504.7510363184.

It can be divided in two parts, 12859 and 7243, that added together give a palindrome (20102).

The spelling of 128597243 in words is "one hundred twenty-eight million, five hundred ninety-seven thousand, two hundred forty-three".