1289049325 has 6 divisors (see below), whose sum is σ = 1598421194. Its totient is φ = 1031239440.

The previous prime is 1289049317. The next prime is 1289049337. The reversal of 1289049325 is 5239409821.

It can be written as a sum of positive squares in 3 ways, for example, as 132641289 + 1156408036 = 11517^2 + 34006^2 .

It is not a de Polignac number, because 1289049325 - 2³ = 1289049317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 25780962 + ... + 25781011.

Almost surely, 2^1289049325 is an apocalyptic number.

It is an amenable number.

1289049325 is a deficient number, since it is larger than the sum of its proper divisors (309371869).

1289049325 is an equidigital number, since it uses as much as digits as its factorization.

1289049325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51561983 (or 51561978 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1289049325 is about 35903.3330625445. Note that the first 3 decimals coincide. The cubic root of 1289049325 is about 1088.3197536089.

The spelling of 1289049325 in words is "one billion, two hundred eighty-nine million, forty-nine thousand, three hundred twenty-five".