249855 has 8 divisors (see below), whose sum is σ = 399792. Its totient is φ = 133248.

The previous prime is 249853. The next prime is 249857. The reversal of 249855 is 558942.

It is an interprime number because it is at equal distance from previous prime (249853) and next prime (249857).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 249855 - 2¹ = 249853 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 16.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249855.

It is not an unprimeable number, because it can be changed into a prime (249853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8314 + ... + 8343.

It is an arithmetic number, because the mean of its divisors is an integer number (49974).

2²⁴⁹⁸⁵⁵ is an apocalyptic number.

249855 is a deficient number, since it is larger than the sum of its proper divisors (149937).

249855 is a wasteful number, since it uses less digits than its factorization.

249855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16665.

The product of its digits is 14400, while the sum is 33.

The square root of 249855 is about 499.8549789689. The cubic root of 249855 is about 62.9838709025.

The spelling of 249855 in words is "two hundred forty-nine thousand, eight hundred fifty-five".