128749259 has 2 divisors, whose sum is σ = 128749260. Its totient is φ = 128749258.

The previous prime is 128749253. The next prime is 128749303. The reversal of 128749259 is 952947821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128749259 is a prime.

It is not a weakly prime, because it can be changed into another prime (128749253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64374629 + 64374630.

It is an arithmetic number, because the mean of its divisors is an integer number (64374630).

Almost surely, 2^128749259 is an apocalyptic number.

128749259 is a deficient number, since it is larger than the sum of its proper divisors (1).

128749259 is an equidigital number, since it uses as much as digits as its factorization.

128749259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 128749259 is about 11346.7730655019. The cubic root of 128749259 is about 504.9498483019.

The spelling of 128749259 in words is "one hundred twenty-eight million, seven hundred forty-nine thousand, two hundred fifty-nine".