12505611 has 4 divisors (see below), whose sum is σ = 16674152. Its totient is φ = 8337072.

The previous prime is 12505607. The next prime is 12505613. The reversal of 12505611 is 11650521.

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

It is not a de Polignac number, because 12505611 - 2² = 12505607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12505613) 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, 2084266 + ... + 2084271.

It is an arithmetic number, because the mean of its divisors is an integer number (4168538).

Almost surely, 2^12505611 is an apocalyptic number.

12505611 is a deficient number, since it is larger than the sum of its proper divisors (4168541).

12505611 is an equidigital number, since it uses as much as digits as its factorization.

12505611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168540.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 12505611 is about 3536.3273321343. The cubic root of 12505611 is about 232.1141617594.

The spelling of 12505611 in words is "twelve million, five hundred five thousand, six hundred eleven".