2857005 has 16 divisors (see below), whose sum is σ = 5079360. Its totient is φ = 1523664.

The previous prime is 2856977. The next prime is 2857009. The reversal of 2857005 is 5007582.

It is a happy number.

2857005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2857005 - 2¹⁶ = 2791469 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2857005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10447 + ... + 10716.

It is an arithmetic number, because the mean of its divisors is an integer number (317460).

2^2857005 is an apocalyptic number.

It is an amenable number.

2857005 is a deficient number, since it is larger than the sum of its proper divisors (2222355).

2857005 is a wasteful number, since it uses less digits than its factorization.

2857005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21177 (or 21171 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 2857005 is about 1690.2677302723. The cubic root of 2857005 is about 141.8960589620.

The spelling of 2857005 in words is "two million, eight hundred fifty-seven thousand, five".