249940 has 12 divisors (see below), whose sum is σ = 524916. Its totient is φ = 99968.

The previous prime is 249923. The next prime is 249943. The reversal of 249940 is 49942.

It can be written as a sum of positive squares in 2 ways, for example, as 111556 + 138384 = 334^2 + 372^2 .

It is a junction number, because it is equal to n+sod(n) for n = 249899 and 249908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6229 + ... + 6268.

It is an arithmetic number, because the mean of its divisors is an integer number (43743).

2²⁴⁹⁹⁴⁰ is an apocalyptic number.

249940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249940 is an abundant number, since it is smaller than the sum of its proper divisors (274976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249940 is a wasteful number, since it uses less digits than its factorization.

249940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12506 (or 12504 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 249940 is about 499.9399963996. The cubic root of 249940 is about 62.9910124073.

The spelling of 249940 in words is "two hundred forty-nine thousand, nine hundred forty".