249918 has 16 divisors (see below), whose sum is σ = 521856. Its totient is φ = 79640.

The previous prime is 249911. The next prime is 249923. The reversal of 249918 is 819942.

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 249918.

It is not an unprimeable number, because it can be changed into a prime (249911) 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, 768 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (32616).

2²⁴⁹⁹¹⁸ is an apocalyptic number.

249918 is an abundant number, since it is smaller than the sum of its proper divisors (271938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249918 is a wasteful number, since it uses less digits than its factorization.

249918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839.

The product of its digits is 5184, while the sum is 33.

The square root of 249918 is about 499.9179932749. The cubic root of 249918 is about 62.9891641732.

The spelling of 249918 in words is "two hundred forty-nine thousand, nine hundred eighteen".