2043857 has 4 divisors (see below), whose sum is σ = 2056560. Its totient is φ = 2031156.

The previous prime is 2043851. The next prime is 2043869. The reversal of 2043857 is 7583402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7583402 = 2 ⋅3791701.

It is a cyclic number.

It is not a de Polignac number, because 2043857 - 2⁴ = 2043841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2043851) 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, 6107 + ... + 6432.

It is an arithmetic number, because the mean of its divisors is an integer number (514140).

2^2043857 is an apocalyptic number.

It is an amenable number.

2043857 is a deficient number, since it is larger than the sum of its proper divisors (12703).

2043857 is a wasteful number, since it uses less digits than its factorization.

2043857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12702.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 2043857 is about 1429.6352681716. The cubic root of 2043857 is about 126.9063935030.

The spelling of 2043857 in words is "two million, forty-three thousand, eight hundred fifty-seven".