12840289225 has 27 divisors (see below), whose sum is σ = 16137706549. Its totient is φ = 10134893600.

The previous prime is 12840289213. The next prime is 12840289237. The reversal of 12840289225 is 52298204821.

The square root of 12840289225 is 113315.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (12840289213) and next prime (12840289237).

It can be written as a sum of positive squares in 4 ways, for example, as 1413534409 + 11426754816 = 37597^2 + 106896^2 .

It is not a de Polignac number, because 12840289225 - 2¹¹ = 12840287177 is a prime.

It is a super-2 number, since 2×12840289225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 74221239 + ... + 74221411.

Almost surely, 2^12840289225 is an apocalyptic number.

12840289225 is the 113315-th square number.

12840289225 is the 56658-th centered octagonal number.

It is an amenable number.

12840289225 is a deficient number, since it is larger than the sum of its proper divisors (3297417324).

12840289225 is an frugal number, since it uses more digits than its factorization.

12840289225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 12840289225 in words is "twelve billion, eight hundred forty million, two hundred eighty-nine thousand, two hundred twenty-five".