12505505 has 4 divisors (see below), whose sum is σ = 15006612. Its totient is φ = 10004400.

The previous prime is 12505501. The next prime is 12505543. The reversal of 12505505 is 50550521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4343056 + 8162449 = 2084^2 + 2857^2 .

It is not a de Polignac number, because 12505505 - 2² = 12505501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12505501) 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 3 ways as a sum of consecutive naturals, for example, 1250546 + ... + 1250555.

It is an arithmetic number, because the mean of its divisors is an integer number (3751653).

Almost surely, 2^12505505 is an apocalyptic number.

It is an amenable number.

12505505 is a deficient number, since it is larger than the sum of its proper divisors (2501107).

12505505 is an equidigital number, since it uses as much as digits as its factorization.

12505505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501106.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 12505505 is about 3536.3123448021. The cubic root of 12505505 is about 232.1135059425.

The spelling of 12505505 in words is "twelve million, five hundred five thousand, five hundred five".