524240 has 20 divisors (see below), whose sum is σ = 1219044. Its totient is φ = 209664.

The previous prime is 524231. The next prime is 524243. The reversal of 524240 is 42425.

It can be written as a sum of positive squares in 2 ways, for example, as 183184 + 341056 = 428^2 + 584^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (524243) by changing a digit.

524240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197 + ... + 3356.

2⁵²⁴²⁴⁰ is an apocalyptic number.

It is an amenable number.

524240 is an abundant number, since it is smaller than the sum of its proper divisors (694804).

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

524240 is a wasteful number, since it uses less digits than its factorization.

524240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566 (or 6560 counting only the distinct ones).

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

The square root of 524240 is about 724.0441975460. The cubic root of 524240 is about 80.6324863349.

Adding to 524240 its reverse (42425), we get a palindrome (566665).

The spelling of 524240 in words is "five hundred twenty-four thousand, two hundred forty".