520870841 has 4 divisors (see below), whose sum is σ = 528006132. Its totient is φ = 513735552.

The previous prime is 520870817. The next prime is 520870843. The reversal of 520870841 is 148078025.

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 315808441 + 205062400 = 17771^2 + 14320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520870841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520870843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3567536 + ... + 3567681.

It is an arithmetic number, because the mean of its divisors is an integer number (132001533).

Almost surely, 2^520870841 is an apocalyptic number.

It is an amenable number.

520870841 is a deficient number, since it is larger than the sum of its proper divisors (7135291).

520870841 is an equidigital number, since it uses as much as digits as its factorization.

520870841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7135290.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 520870841 is about 22822.5949663924. The cubic root of 520870841 is about 804.5938004432.

The spelling of 520870841 in words is "five hundred twenty million, eight hundred seventy thousand, eight hundred forty-one".