12647725 has 12 divisors (see below), whose sum is σ = 15841620. Its totient is φ = 10016000.

The previous prime is 12647717. The next prime is 12647729. The reversal of 12647725 is 52774621.

It can be written as a sum of positive squares in 6 ways, for example, as 236196 + 12411529 = 486^2 + 3523^2 .

It is not a de Polignac number, because 12647725 - 2³ = 12647717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12647729) 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 11 ways as a sum of consecutive naturals, for example, 21 + ... + 5029.

It is an arithmetic number, because the mean of its divisors is an integer number (1320135).

Almost surely, 2^12647725 is an apocalyptic number.

It is an amenable number.

12647725 is a deficient number, since it is larger than the sum of its proper divisors (3193895).

12647725 is a wasteful number, since it uses less digits than its factorization.

12647725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120 (or 5115 counting only the distinct ones).

The product of its digits is 23520, while the sum is 34.

The square root of 12647725 is about 3556.3640139896. The cubic root of 12647725 is about 232.9901019330.

The spelling of 12647725 in words is "twelve million, six hundred forty-seven thousand, seven hundred twenty-five".