520742 has 8 divisors (see below), whose sum is σ = 790776. Its totient is φ = 257152.

The previous prime is 520721. The next prime is 520747. The reversal of 520742 is 247025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520747) 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 3 ways as a sum of consecutive naturals, for example, 1403 + ... + 1734.

It is an arithmetic number, because the mean of its divisors is an integer number (98847).

2⁵²⁰⁷⁴² is an apocalyptic number.

520742 is a deficient number, since it is larger than the sum of its proper divisors (270034).

520742 is a wasteful number, since it uses less digits than its factorization.

520742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 520742 is about 721.6245561232. The cubic root of 520742 is about 80.4527454361.

Adding to 520742 its reverse (247025), we get a palindrome (767767).

The spelling of 520742 in words is "five hundred twenty thousand, seven hundred forty-two".