249013 has 4 divisors (see below), whose sum is σ = 254848. Its totient is φ = 243180.

The previous prime is 248987. The next prime is 249017. The reversal of 249013 is 310942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249013 - 2⁵ = 248981 is a prime.

It is a Duffinian number.

249013 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249017) 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, 2853 + ... + 2938.

It is an arithmetic number, because the mean of its divisors is an integer number (63712).

2²⁴⁹⁰¹³ is an apocalyptic number.

It is an amenable number.

249013 is a deficient number, since it is larger than the sum of its proper divisors (5835).

249013 is an equidigital number, since it uses as much as digits as its factorization.

249013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5834.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 249013 is about 499.0120239032. The cubic root of 249013 is about 62.9130403496.

Adding to 249013 its reverse (310942), we get a palindrome (559955).

The spelling of 249013 in words is "two hundred forty-nine thousand, thirteen".