1281315325 has 6 divisors (see below), whose sum is σ = 1588831034. Its totient is φ = 1025052240.

The previous prime is 1281315317. The next prime is 1281315337. The reversal of 1281315325 is 5235131821.

It can be written as a sum of positive squares in 3 ways, for example, as 367220569 + 914094756 = 19163^2 + 30234^2 .

It is not a de Polignac number, because 1281315325 - 2³ = 1281315317 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 (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25626282 + ... + 25626331.

Almost surely, 2^1281315325 is an apocalyptic number.

It is an amenable number.

1281315325 is a deficient number, since it is larger than the sum of its proper divisors (307515709).

1281315325 is an equidigital number, since it uses as much as digits as its factorization.

1281315325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51252623 (or 51252618 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 1281315325 is about 35795.4651457416. The cubic root of 1281315325 is about 1086.1388298766.

The spelling of 1281315325 in words is "one billion, two hundred eighty-one million, three hundred fifteen thousand, three hundred twenty-five".