249748 has 12 divisors (see below), whose sum is σ = 452340. Its totient is φ = 120512.

The previous prime is 249737. The next prime is 249749. The reversal of 249748 is 847942.

It is a happy number.

249748 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 66564 + 183184 = 258^2 + 428^2 .

It is a super-3 number, since 3×249748³ = 46733392835990976, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249749) by changing a digit.

249748 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, 961 + ... + 1192.

It is an arithmetic number, because the mean of its divisors is an integer number (37695).

2²⁴⁹⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

249748 is a deficient number, since it is larger than the sum of its proper divisors (202592).

249748 is a wasteful number, since it uses less digits than its factorization.

249748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186 (or 2184 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 249748 is about 499.7479364640. The cubic root of 249748 is about 62.9748787051.

The spelling of 249748 in words is "two hundred forty-nine thousand, seven hundred forty-eight".