520542420 has 48 divisors (see below), whose sum is σ = 1459019520. Its totient is φ = 138668416.

The previous prime is 520542413. The next prime is 520542457. The reversal of 520542420 is 24245025.

It is a happy number.

It is a super-2 number, since 2×520542420² = 541928822038912800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62629 + ... + 70451.

It is an arithmetic number, because the mean of its divisors is an integer number (30396240).

Almost surely, 2^520542420 is an apocalyptic number.

It is an amenable number.

520542420 is an abundant number, since it is smaller than the sum of its proper divisors (938477100).

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

520542420 is a wasteful number, since it uses less digits than its factorization.

520542420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8944 (or 8942 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 520542420 is about 22815.3987473373. The cubic root of 520542420 is about 804.4246599470.

Adding to 520542420 its reverse (24245025), we get a palindrome (544787445).

The spelling of 520542420 in words is "five hundred twenty million, five hundred forty-two thousand, four hundred twenty".