1289456825 has 6 divisors (see below), whose sum is σ = 1598926494. Its totient is φ = 1031565440.

The previous prime is 1289456801. The next prime is 1289456827. The reversal of 1289456825 is 5286549821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 72361 + 1289384464 = 269^2 + 35908^2 .

It is not a de Polignac number, because 1289456825 - 2⁶ = 1289456761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289456827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25789112 + ... + 25789161.

It is an arithmetic number, because the mean of its divisors is an integer number (266487749).

Almost surely, 2^1289456825 is an apocalyptic number.

It is an amenable number.

1289456825 is a deficient number, since it is larger than the sum of its proper divisors (309469669).

1289456825 is an equidigital number, since it uses as much as digits as its factorization.

1289456825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51578283 (or 51578278 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 50.

The square root of 1289456825 is about 35909.0075747019. The cubic root of 1289456825 is about 1088.4344230185.

The spelling of 1289456825 in words is "one billion, two hundred eighty-nine million, four hundred fifty-six thousand, eight hundred twenty-five".