128751529 has 2 divisors, whose sum is σ = 128751530. Its totient is φ = 128751528.

The previous prime is 128751479. The next prime is 128751533. The reversal of 128751529 is 925157821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122699929 + 6051600 = 11077^2 + 2460^2 .

It is a cyclic number.

It is not a de Polignac number, because 128751529 - 2¹³ = 128743337 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128751491 and 128751500.

It is not a weakly prime, because it can be changed into another prime (128751559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64375764 + 64375765.

It is an arithmetic number, because the mean of its divisors is an integer number (64375765).

Almost surely, 2^128751529 is an apocalyptic number.

It is an amenable number.

128751529 is a deficient number, since it is larger than the sum of its proper divisors (1).

128751529 is an equidigital number, since it uses as much as digits as its factorization.

128751529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 128751529 is about 11346.8730935003. The cubic root of 128751529 is about 504.9528159033.

The spelling of 128751529 in words is "one hundred twenty-eight million, seven hundred fifty-one thousand, five hundred twenty-nine".