249868 has 6 divisors (see below), whose sum is σ = 437276. Its totient is φ = 124932.

The previous prime is 249863. The next prime is 249871. The reversal of 249868 is 868942.

It is not an unprimeable number, because it can be changed into a prime (249863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31230 + ... + 31237.

2²⁴⁹⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

249868 is a deficient number, since it is larger than the sum of its proper divisors (187408).

249868 is a wasteful number, since it uses less digits than its factorization.

249868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62471 (or 62469 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 249868 is about 499.8679825714. The cubic root of 249868 is about 62.9849632376.

The spelling of 249868 in words is "two hundred forty-nine thousand, eight hundred sixty-eight".