520342 has 4 divisors (see below), whose sum is σ = 780516. Its totient is φ = 260170.

The previous prime is 520339. The next prime is 520349. The reversal of 520342 is 243025.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520349) 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 as a sum of consecutive naturals, namely, 130084 + ... + 130087.

It is an arithmetic number, because the mean of its divisors is an integer number (195129).

2⁵²⁰³⁴² is an apocalyptic number.

520342 is a deficient number, since it is larger than the sum of its proper divisors (260174).

520342 is a wasteful number, since it uses less digits than its factorization.

520342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260173.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 520342 is about 721.3473504491. The cubic root of 520342 is about 80.4321406443.

Adding to 520342 its reverse (243025), we get a palindrome (763367).

The spelling of 520342 in words is "five hundred twenty thousand, three hundred forty-two".