249289 has 4 divisors (see below), whose sum is σ = 252180. Its totient is φ = 246400.

The previous prime is 249287. The next prime is 249311. The reversal of 249289 is 982942.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85264 + 164025 = 292^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 249289 - 2¹ = 249287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249287) 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, 1312 + ... + 1489.

It is an arithmetic number, because the mean of its divisors is an integer number (63045).

2²⁴⁹²⁸⁹ is an apocalyptic number.

It is an amenable number.

249289 is a deficient number, since it is larger than the sum of its proper divisors (2891).

249289 is an equidigital number, since it uses as much as digits as its factorization.

249289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890.

The product of its digits is 10368, while the sum is 34.

The square root of 249289 is about 499.2884937589. The cubic root of 249289 is about 62.9362755326.

The spelling of 249289 in words is "two hundred forty-nine thousand, two hundred eighty-nine".