520420105 has 4 divisors (see below), whose sum is σ = 624504132. Its totient is φ = 416336080.

The previous prime is 520420081. The next prime is 520420111. The reversal of 520420105 is 501024025.

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

It can be written as a sum of positive squares in 2 ways, for example, as 191324224 + 329095881 = 13832^2 + 18141^2 .

It is not a de Polignac number, because 520420105 - 2⁹ = 520419593 is a prime.

It is a super-2 number, since 2×520420105² = 541674171376422050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52042006 + ... + 52042015.

It is an arithmetic number, because the mean of its divisors is an integer number (156126033).

Almost surely, 2^520420105 is an apocalyptic number.

It is an amenable number.

520420105 is a deficient number, since it is larger than the sum of its proper divisors (104084027).

520420105 is a wasteful number, since it uses less digits than its factorization.

520420105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104084026.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 520420105 is about 22812.7180537524. The cubic root of 520420105 is about 804.3616481691.

The spelling of 520420105 in words is "five hundred twenty million, four hundred twenty thousand, one hundred five".