12857245 has 4 divisors (see below), whose sum is σ = 15428700. Its totient is φ = 10285792.

The previous prime is 12857239. The next prime is 12857267. The reversal of 12857245 is 54275821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54275821 = 113 ⋅480317.

It can be written as a sum of positive squares in 2 ways, for example, as 9566649 + 3290596 = 3093^2 + 1814^2 .

It is a cyclic number.

It is not a de Polignac number, because 12857245 - 2²¹ = 10760093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12857245.

It is a congruent number.

It is an unprimeable number.

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, 1285720 + ... + 1285729.

It is an arithmetic number, because the mean of its divisors is an integer number (3857175).

Almost surely, 2^12857245 is an apocalyptic number.

It is an amenable number.

12857245 is a deficient number, since it is larger than the sum of its proper divisors (2571455).

12857245 is an equidigital number, since it uses as much as digits as its factorization.

12857245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571454.

The product of its digits is 22400, while the sum is 34.

The square root of 12857245 is about 3585.7000711158. The cubic root of 12857245 is about 234.2696200631.

The spelling of 12857245 in words is "twelve million, eight hundred fifty-seven thousand, two hundred forty-five".