249043 has 4 divisors (see below), whose sum is σ = 250120. Its totient is φ = 247968.

The previous prime is 249037. The next prime is 249059. The reversal of 249043 is 340942.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33 + ... + 706.

It is an arithmetic number, because the mean of its divisors is an integer number (62530).

2²⁴⁹⁰⁴³ is an apocalyptic number.

249043 is a deficient number, since it is larger than the sum of its proper divisors (1077).

249043 is an equidigital number, since it uses as much as digits as its factorization.

249043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 249043 is about 499.0420823939. The cubic root of 249043 is about 62.9155667444.

Adding to 249043 its reverse (340942), we get a palindrome (589985).

The spelling of 249043 in words is "two hundred forty-nine thousand, forty-three".