128311259 has 2 divisors, whose sum is σ = 128311260. Its totient is φ = 128311258.

The previous prime is 128311241. The next prime is 128311303. The reversal of 128311259 is 952113821.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (952113821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128311259 - 2²⁰ = 127262683 is a prime.

It is not a weakly prime, because it can be changed into another prime (128311229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64155629 + 64155630.

It is an arithmetic number, because the mean of its divisors is an integer number (64155630).

Almost surely, 2^128311259 is an apocalyptic number.

128311259 is a deficient number, since it is larger than the sum of its proper divisors (1).

128311259 is an equidigital number, since it uses as much as digits as its factorization.

128311259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 128311259 is about 11327.4559809341. The cubic root of 128311259 is about 504.3765911247.

The spelling of 128311259 in words is "one hundred twenty-eight million, three hundred eleven thousand, two hundred fifty-nine".