12657205 has 12 divisors (see below), whose sum is σ = 16695756. Its totient is φ = 9204800.

The previous prime is 12657191. The next prime is 12657209. The reversal of 12657205 is 50275621.

It can be written as a sum of positive squares in 2 ways, for example, as 6853924 + 5803281 = 2618^2 + 2409^2 .

It is not a de Polignac number, because 12657205 - 2⁷ = 12657077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12657209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9856 + ... + 11065.

It is an arithmetic number, because the mean of its divisors is an integer number (1391313).

Almost surely, 2^12657205 is an apocalyptic number.

It is an amenable number.

12657205 is a deficient number, since it is larger than the sum of its proper divisors (4038551).

12657205 is a wasteful number, since it uses less digits than its factorization.

12657205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20948 (or 20937 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 12657205 is about 3557.6965862760. The cubic root of 12657205 is about 233.0482993439.

The spelling of 12657205 in words is "twelve million, six hundred fifty-seven thousand, two hundred five".