12506605 has 8 divisors (see below), whose sum is σ = 15039864. Its totient is φ = 9984000.

The previous prime is 12506587. The next prime is 12506651. The reversal of 12506605 is 50660521.

It can be written as a sum of positive squares in 4 ways, for example, as 769129 + 11737476 = 877^2 + 3426^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12506605 - 2⁵ = 12506573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12506605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205 + ... + 5005.

It is an arithmetic number, because the mean of its divisors is an integer number (1879983).

Almost surely, 2^12506605 is an apocalyptic number.

It is an amenable number.

12506605 is a deficient number, since it is larger than the sum of its proper divisors (2533259).

12506605 is an equidigital number, since it uses as much as digits as its factorization.

12506605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5327.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 12506605 is about 3536.4678706302. The cubic root of 12506605 is about 232.1203114086.

The spelling of 12506605 in words is "twelve million, five hundred six thousand, six hundred five".