2857047 has 4 divisors (see below), whose sum is σ = 3809400. Its totient is φ = 1904696.

The previous prime is 2857039. The next prime is 2857061. The reversal of 2857047 is 7407582.

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

It is a cyclic number.

It is not a de Polignac number, because 2857047 - 2³ = 2857039 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2856999 and 2857017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857067) 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, 476172 + ... + 476177.

It is an arithmetic number, because the mean of its divisors is an integer number (952350).

2^2857047 is an apocalyptic number.

2857047 is a deficient number, since it is larger than the sum of its proper divisors (952353).

2857047 is an equidigital number, since it uses as much as digits as its factorization.

2857047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952352.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 2857047 is about 1690.2801542940. The cubic root of 2857047 is about 141.8967542828.

It can be divided in two parts, 28 and 57047, that added together give a palindrome (57075).

The spelling of 2857047 in words is "two million, eight hundred fifty-seven thousand, forty-seven".