249556 has 12 divisors (see below), whose sum is σ = 442260. Its totient is φ = 123200.

The previous prime is 249541. The next prime is 249563. The reversal of 249556 is 655942.

249556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 133956 + 115600 = 366^2 + 340^2 .

It is a congruent number.

It is an unprimeable number.

249556 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 6 + ... + 706.

It is an arithmetic number, because the mean of its divisors is an integer number (36855).

2²⁴⁹⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

249556 is a deficient number, since it is larger than the sum of its proper divisors (192704).

249556 is a wasteful number, since it uses less digits than its factorization.

249556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 792 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 249556 is about 499.5558026887. Note that the first 3 decimals coincide. The cubic root of 249556 is about 62.9587367320.

The spelling of 249556 in words is "two hundred forty-nine thousand, five hundred fifty-six".