1128028129 has 2 divisors, whose sum is σ = 1128028130. Its totient is φ = 1128028128.

The previous prime is 1128028127. The next prime is 1128028151. The reversal of 1128028129 is 9218208211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 754765729 + 373262400 = 27473^2 + 19320^2 .

It is an emirp because it is prime and its reverse (9218208211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1128028129 - 2¹ = 1128028127 is a prime.

Together with 1128028127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1128028094 and 1128028103.

It is not a weakly prime, because it can be changed into another prime (1128028127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564014064 + 564014065.

It is an arithmetic number, because the mean of its divisors is an integer number (564014065).

Almost surely, 2^1128028129 is an apocalyptic number.

It is an amenable number.

1128028129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128028129 is an equidigital number, since it uses as much as digits as its factorization.

1128028129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 1128028129 is about 33586.1300092762. The cubic root of 1128028129 is about 1040.9742254794.

The spelling of 1128028129 in words is "one billion, one hundred twenty-eight million, twenty-eight thousand, one hundred twenty-nine".