12857707 has 4 divisors (see below), whose sum is σ = 12918856. Its totient is φ = 12796560.

The previous prime is 12857659. The next prime is 12857711. The reversal of 12857707 is 70775821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70775821 = 31 ⋅2283091.

It is a cyclic number.

It is not a de Polignac number, because 12857707 - 2²³ = 4469099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12857107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30258 + ... + 30679.

It is an arithmetic number, because the mean of its divisors is an integer number (3229714).

Almost surely, 2^12857707 is an apocalyptic number.

12857707 is a deficient number, since it is larger than the sum of its proper divisors (61149).

12857707 is an equidigital number, since it uses as much as digits as its factorization.

12857707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61148.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 12857707 is about 3585.7644931032. The cubic root of 12857707 is about 234.2724260366.

The spelling of 12857707 in words is "twelve million, eight hundred fifty-seven thousand, seven hundred seven".