1025528489 has 2 divisors, whose sum is σ = 1025528490. Its totient is φ = 1025528488.

The previous prime is 1025528459. The next prime is 1025528503. The reversal of 1025528489 is 9848255201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799928089 + 225600400 = 28283^2 + 15020^2 .

It is an emirp because it is prime and its reverse (9848255201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1025528489 - 2²⁸ = 757093033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025528459) 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, 512764244 + 512764245.

It is an arithmetic number, because the mean of its divisors is an integer number (512764245).

Almost surely, 2^1025528489 is an apocalyptic number.

It is an amenable number.

1025528489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025528489 is an equidigital number, since it uses as much as digits as its factorization.

1025528489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 1025528489 is about 32023.8737350746. The cubic root of 1025528489 is about 1008.4380946243.

The spelling of 1025528489 in words is "one billion, twenty-five million, five hundred twenty-eight thousand, four hundred eighty-nine".