249011 has 4 divisors (see below), whose sum is σ = 284592. Its totient is φ = 213432.

The previous prime is 248987. The next prime is 249017. The reversal of 249011 is 110942.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249011 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249011.

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, 17780 + ... + 17793.

It is an arithmetic number, because the mean of its divisors is an integer number (71148).

2²⁴⁹⁰¹¹ is an apocalyptic number.

249011 is a deficient number, since it is larger than the sum of its proper divisors (35581).

249011 is an equidigital number, since it uses as much as digits as its factorization.

249011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35580.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 249011 is about 499.0100199395. The cubic root of 249011 is about 62.9128719161.

Adding to 249011 its reverse (110942), we get a palindrome (359953).

The spelling of 249011 in words is "two hundred forty-nine thousand, eleven".