12857143 has 4 divisors (see below), whose sum is σ = 13846168. Its totient is φ = 11868120.

The previous prime is 12857137. The next prime is 12857147. The reversal of 12857143 is 34175821.

12857143 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 an emirpimes, since its reverse is a distinct semiprime: 34175821 = 191 ⋅178931.

It is a cyclic number.

It is not a de Polignac number, because 12857143 - 2¹³ = 12848951 is a prime.

It is a super-4 number, since 4×12857143⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857147) by changing a digit.

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, 494493 + ... + 494518.

It is an arithmetic number, because the mean of its divisors is an integer number (3461542).

Almost surely, 2^12857143 is an apocalyptic number.

12857143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12857143 is a deficient number, since it is larger than the sum of its proper divisors (989025).

12857143 is an equidigital number, since it uses as much as digits as its factorization.

12857143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989024.

The product of its digits is 6720, while the sum is 31.

The square root of 12857143 is about 3585.6858479237. The cubic root of 12857143 is about 234.2690005534.

The spelling of 12857143 in words is "twelve million, eight hundred fifty-seven thousand, one hundred forty-three".