520418 has 4 divisors (see below), whose sum is σ = 780630. Its totient is φ = 260208.

The previous prime is 520411. The next prime is 520423. The reversal of 520418 is 814025.

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

It can be written as a sum of positive squares in only one way, i.e., 332929 + 187489 = 577^2 + 433^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 520418.

It is not an unprimeable number, because it can be changed into a prime (520411) by changing a digit.

520418 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130103 + ... + 130106.

2⁵²⁰⁴¹⁸ is an apocalyptic number.

520418 is a deficient number, since it is larger than the sum of its proper divisors (260212).

520418 is a wasteful number, since it uses less digits than its factorization.

520418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260211.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 520418 is about 721.4000277239. The cubic root of 520418 is about 80.4360563671.

It can be divided in two parts, 52041 and 8, that multiplied together give a triangular number (416328 = T₉₁₂).

The spelling of 520418 in words is "five hundred twenty thousand, four hundred eighteen".