520642 has 8 divisors (see below), whose sum is σ = 826956. Its totient is φ = 244992.

The previous prime is 520633. The next prime is 520649. The reversal of 520642 is 246025.

520642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 491401 + 29241 = 701^2 + 171^2 .

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

It is not an unprimeable number, because it can be changed into a prime (520649) 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, 7623 + ... + 7690.

2⁵²⁰⁶⁴² is an apocalyptic number.

520642 is a deficient number, since it is larger than the sum of its proper divisors (306314).

520642 is a wasteful number, since it uses less digits than its factorization.

520642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15332.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 520642 is about 721.5552646887. Note that the first 3 decimals coincide. The cubic root of 520642 is about 80.4475952277.

Adding to 520642 its reverse (246025), we get a palindrome (766667).

The spelling of 520642 in words is "five hundred twenty thousand, six hundred forty-two".