524540 has 12 divisors (see below), whose sum is σ = 1101576. Its totient is φ = 209808.

The previous prime is 524521. The next prime is 524591. The reversal of 524540 is 45425.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 26227 = 524540 / (5 + 2 + 4 + 5 + 4 + 0).

It is a d-powerful number, because it can be written as 5³ + 2 + 5³ + 4⁹ + 4⁹ + 0 .

It is a congruent number.

It is an unprimeable number.

524540 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13094 + ... + 13133.

It is an arithmetic number, because the mean of its divisors is an integer number (91798).

2⁵²⁴⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

524540 is an abundant number, since it is smaller than the sum of its proper divisors (577036).

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

524540 is a wasteful number, since it uses less digits than its factorization.

524540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26236 (or 26234 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 524540 is about 724.2513375894. The cubic root of 524540 is about 80.6478642363.

Adding to 524540 its reverse (45425), we get a palindrome (569965).

The spelling of 524540 in words is "five hundred twenty-four thousand, five hundred forty".