128751361 has 2 divisors, whose sum is σ = 128751362. Its totient is φ = 128751360.

The previous prime is 128751349. The next prime is 128751397. The reversal of 128751361 is 163157821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128686336 + 65025 = 11344^2 + 255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128751361 is a prime.

It is not a weakly prime, because it can be changed into another prime (128751661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64375680 + 64375681.

It is an arithmetic number, because the mean of its divisors is an integer number (64375681).

Almost surely, 2^128751361 is an apocalyptic number.

It is an amenable number.

128751361 is a deficient number, since it is larger than the sum of its proper divisors (1).

128751361 is an equidigital number, since it uses as much as digits as its factorization.

128751361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 128751361 is about 11346.8656905773. The cubic root of 128751361 is about 504.9525962758.

The spelling of 128751361 in words is "one hundred twenty-eight million, seven hundred fifty-one thousand, three hundred sixty-one".