549857 has 16 divisors (see below), whose sum is σ = 707712. Its totient is φ = 414720.

The previous prime is 549839. The next prime is 549863. The reversal of 549857 is 758945.

It is a cyclic number.

It is not a de Polignac number, because 549857 - 2¹⁰ = 548833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 549857.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549857.

It is not an unprimeable number, because it can be changed into a prime (549817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2753 + ... + 2945.

It is an arithmetic number, because the mean of its divisors is an integer number (44232).

2⁵⁴⁹⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

549857 is a deficient number, since it is larger than the sum of its proper divisors (157855).

549857 is a wasteful number, since it uses less digits than its factorization.

549857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248.

The product of its digits is 50400, while the sum is 38.

The square root of 549857 is about 741.5234318617. The cubic root of 549857 is about 81.9250256602.

It can be divided in two parts, 5498 and 57, that added together give a palindrome (5555).

The spelling of 549857 in words is "five hundred forty-nine thousand, eight hundred fifty-seven".