252440 has 16 divisors (see below), whose sum is σ = 568080. Its totient is φ = 100960.

The previous prime is 252431. The next prime is 252443. The reversal of 252440 is 44252.

252440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252443) 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, 3116 + ... + 3195.

It is an arithmetic number, because the mean of its divisors is an integer number (35505).

2²⁵²⁴⁴⁰ is an apocalyptic number.

252440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252440 is an abundant number, since it is smaller than the sum of its proper divisors (315640).

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

252440 is a wasteful number, since it uses less digits than its factorization.

252440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322 (or 6318 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 252440 is about 502.4340752775. The cubic root of 252440 is about 63.2003364827.

Adding to 252440 its reverse (44252), we get a palindrome (296692).

The spelling of 252440 in words is "two hundred fifty-two thousand, four hundred forty".