250040 has 64 divisors (see below), whose sum is σ = 691200. Its totient is φ = 79488.

The previous prime is 250037. The next prime is 250043. The reversal of 250040 is 40052.

250040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (250037) and next prime (250043).

It is a sliding number, since 250040 = 40 + 250000 and 1/40 + 1/250000 = 0.0250040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5297 + ... + 5343.

It is an arithmetic number, because the mean of its divisors is an integer number (10800).

250040 is a Friedman number, since it can be written as 500^2+40, using all its digits and the basic arithmetic operations.

2²⁵⁰⁰⁴⁰ is an apocalyptic number.

250040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 250040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345600).

250040 is an abundant number, since it is smaller than the sum of its proper divisors (441160).

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

250040 is a wasteful number, since it uses less digits than its factorization.

250040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 250040 is about 500.0399984001. The cubic root of 250040 is about 62.9994121050. Note that the first 3 decimals are identical.

Subtracting from 250040 its product of nonzero digits (40), we obtain a square (250000 = 500²).

Adding to 250040 its reverse (40052), we get a palindrome (290092).

It can be divided in two parts, 2500 and 40, that multiplied together give a 5-th power (100000 = 10⁵).

The spelling of 250040 in words is "two hundred fifty thousand, forty".