2857143 has 4 divisors (see below), whose sum is σ = 3809528. Its totient is φ = 1904760.

The previous prime is 2857123. The next prime is 2857159. The reversal of 2857143 is 3417582.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2857143 - 2⁶ = 2857079 is a prime.

It is a super-2 number, since 2×2857143² = 16326532244898, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2857143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857123) 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, 476188 + ... + 476193.

It is an arithmetic number, because the mean of its divisors is an integer number (952382).

2^2857143 is an apocalyptic number.

2857143 is a deficient number, since it is larger than the sum of its proper divisors (952385).

2857143 is an equidigital number, since it uses as much as digits as its factorization.

2857143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952384.

The product of its digits is 6720, while the sum is 30.

The square root of 2857143 is about 1690.3085517147. The cubic root of 2857143 is about 141.8983435620.

The spelling of 2857143 in words is "two million, eight hundred fifty-seven thousand, one hundred forty-three".