12006857 has 4 divisors (see below), whose sum is σ = 12017280. Its totient is φ = 11996436.

The previous prime is 12006829. The next prime is 12006859. The reversal of 12006857 is 75860021.

12006857 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12006857 - 2¹² = 12002761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12006859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3233 + ... + 5870.

It is an arithmetic number, because the mean of its divisors is an integer number (3004320).

Almost surely, 2^12006857 is an apocalyptic number.

It is an amenable number.

12006857 is a deficient number, since it is larger than the sum of its proper divisors (10423).

12006857 is an equidigital number, since it uses as much as digits as its factorization.

12006857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10422.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 12006857 is about 3465.0911964911. The cubic root of 12006857 is about 228.9864474604.

Adding to 12006857 its reverse (75860021), we get a palindrome (87866878).

The spelling of 12006857 in words is "twelve million, six thousand, eight hundred fifty-seven".