12805725 has 24 divisors (see below), whose sum is σ = 21373632. Its totient is φ = 6764800.

The previous prime is 12805721. The next prime is 12805729. The reversal of 12805725 is 52750821.

It is an interprime number because it is at equal distance from previous prime (12805721) and next prime (12805729).

It is not a de Polignac number, because 12805725 - 2² = 12805721 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12805692 and 12805701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7720 + ... + 9230.

It is an arithmetic number, because the mean of its divisors is an integer number (890568).

Almost surely, 2^12805725 is an apocalyptic number.

12805725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12805725 is a deficient number, since it is larger than the sum of its proper divisors (8567907).

12805725 is a wasteful number, since it uses less digits than its factorization.

12805725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637 (or 1632 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 12805725 is about 3578.5087676293. The cubic root of 12805725 is about 233.9562888621.

It can be divided in two parts, 12805 and 725, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 12805725 in words is "twelve million, eight hundred five thousand, seven hundred twenty-five".