12647505 has 32 divisors (see below), whose sum is σ = 22095360. Its totient is φ = 6140160.

The previous prime is 12647491. The next prime is 12647513. The reversal of 12647505 is 50574621.

It is not a de Polignac number, because 12647505 - 2⁴ = 12647489 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14995 + ... + 15815.

It is an arithmetic number, because the mean of its divisors is an integer number (690480).

Almost surely, 2^12647505 is an apocalyptic number.

12647505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12647505 is a deficient number, since it is larger than the sum of its proper divisors (9447855).

12647505 is a wasteful number, since it uses less digits than its factorization.

12647505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 12647505 is about 3556.3330833880. Note that the first 3 decimals coincide. The cubic root of 12647505 is about 232.9887510149.

The spelling of 12647505 in words is "twelve million, six hundred forty-seven thousand, five hundred five".