1025265589 has 2 divisors, whose sum is σ = 1025265590. Its totient is φ = 1025265588.

The previous prime is 1025265583. The next prime is 1025265607. The reversal of 1025265589 is 9855625201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 573363025 + 451902564 = 23945^2 + 21258^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025265589 - 2³ = 1025265581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025265581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512632794 + 512632795.

It is an arithmetic number, because the mean of its divisors is an integer number (512632795).

Almost surely, 2^1025265589 is an apocalyptic number.

It is an amenable number.

1025265589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025265589 is an equidigital number, since it uses as much as digits as its factorization.

1025265589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 1025265589 is about 32019.7687218381. The cubic root of 1025265589 is about 1008.3519143325.

The spelling of 1025265589 in words is "one billion, twenty-five million, two hundred sixty-five thousand, five hundred eighty-nine".