2047857 has 12 divisors (see below), whose sum is σ = 3176496. Its totient is φ = 1170120.

The previous prime is 2047841. The next prime is 2047879. The reversal of 2047857 is 7587402.

It is not a de Polignac number, because 2047857 - 2⁴ = 2047841 is a prime.

2047857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2047957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6819 + ... + 7112.

It is an arithmetic number, because the mean of its divisors is an integer number (264708).

2^2047857 is an apocalyptic number.

It is an amenable number.

2047857 is a deficient number, since it is larger than the sum of its proper divisors (1128639).

2047857 is a wasteful number, since it uses less digits than its factorization.

2047857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13948 (or 13941 counting only the distinct ones).

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

The square root of 2047857 is about 1431.0335425838. The cubic root of 2047857 is about 126.9891283810.

The spelling of 2047857 in words is "two million, forty-seven thousand, eight hundred fifty-seven".