520842 has 16 divisors (see below), whose sum is σ = 1190592. Its totient is φ = 148800.

The previous prime is 520841. The next prime is 520853. The reversal of 520842 is 248025.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (520841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6159 + ... + 6242.

It is an arithmetic number, because the mean of its divisors is an integer number (74412).

2⁵²⁰⁸⁴² is an apocalyptic number.

520842 is an abundant number, since it is smaller than the sum of its proper divisors (669750).

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

520842 is a wasteful number, since it uses less digits than its factorization.

520842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12413.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 520842 is about 721.6938409049. The cubic root of 520842 is about 80.4578949853.

Adding to 520842 its reverse (248025), we get a palindrome (768867).

The spelling of 520842 in words is "five hundred twenty thousand, eight hundred forty-two".