12648605 has 4 divisors (see below), whose sum is σ = 15178332. Its totient is φ = 10118880.

The previous prime is 12648569. The next prime is 12648613. The reversal of 12648605 is 50684621.

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 4104676 + 8543929 = 2026^2 + 2923^2 .

It is not a de Polignac number, because 12648605 - 2¹⁰ = 12647581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264856 + ... + 1264865.

It is an arithmetic number, because the mean of its divisors is an integer number (3794583).

Almost surely, 2^12648605 is an apocalyptic number.

It is an amenable number.

12648605 is a deficient number, since it is larger than the sum of its proper divisors (2529727).

12648605 is an equidigital number, since it uses as much as digits as its factorization.

12648605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529726.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 12648605 is about 3556.4877337058. The cubic root of 12648605 is about 232.9955054485.

The spelling of 12648605 in words is "twelve million, six hundred forty-eight thousand, six hundred five".