2857142 has 4 divisors (see below), whose sum is σ = 4285716. Its totient is φ = 1428570.

The previous prime is 2857123. The next prime is 2857159. The reversal of 2857142 is 2417582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2417582 = 2 ⋅1208791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714284 + ... + 714287.

It is an arithmetic number, because the mean of its divisors is an integer number (1071429).

2^2857142 is an apocalyptic number.

2857142 is a deficient number, since it is larger than the sum of its proper divisors (1428574).

2857142 is a wasteful number, since it uses less digits than its factorization.

2857142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428573.

The product of its digits is 4480, while the sum is 29.

The square root of 2857142 is about 1690.3082559107. The cubic root of 2857142 is about 141.8983270072.

The spelling of 2857142 in words is "two million, eight hundred fifty-seven thousand, one hundred forty-two".