520120841 has 4 divisors (see below), whose sum is σ = 521538432. Its totient is φ = 518703252.

The previous prime is 520120817. The next prime is 520120891. The reversal of 520120841 is 148021025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520120841 - 2¹⁴ = 520104457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520120891) 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, 708245 + ... + 708978.

It is an arithmetic number, because the mean of its divisors is an integer number (130384608).

Almost surely, 2^520120841 is an apocalyptic number.

It is an amenable number.

520120841 is a deficient number, since it is larger than the sum of its proper divisors (1417591).

520120841 is a wasteful number, since it uses less digits than its factorization.

520120841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417590.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 520120841 is about 22806.1579622698. The cubic root of 520120841 is about 804.2074377293.

Adding to 520120841 its reverse (148021025), we get a palindrome (668141866).

The spelling of 520120841 in words is "five hundred twenty million, one hundred twenty thousand, eight hundred forty-one".