249065 has 8 divisors (see below), whose sum is σ = 302280. Its totient is φ = 196992.

The previous prime is 249059. The next prime is 249079. The reversal of 249065 is 560942.

249065 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in 4 ways, for example, as 85849 + 163216 = 293^2 + 404^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 249065 - 2¹⁰ = 248041 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 317 + ... + 773.

It is an arithmetic number, because the mean of its divisors is an integer number (37785).

2²⁴⁹⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

249065 is a deficient number, since it is larger than the sum of its proper divisors (53215).

249065 is a wasteful number, since it uses less digits than its factorization.

249065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 249065 is about 499.0641241364. The cubic root of 249065 is about 62.9174193050.

The spelling of 249065 in words is "two hundred forty-nine thousand, sixty-five".