520091 has 8 divisors (see below), whose sum is σ = 611184. Its totient is φ = 436320.

The previous prime is 520073. The next prime is 520103. The reversal of 520091 is 190025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520091 - 2¹⁰ = 519067 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (520021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1676 + ... + 1961.

It is an arithmetic number, because the mean of its divisors is an integer number (76398).

2⁵²⁰⁰⁹¹ is an apocalyptic number.

520091 is a deficient number, since it is larger than the sum of its proper divisors (91093).

520091 is a wasteful number, since it uses less digits than its factorization.

520091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3661.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 520091 is about 721.1733494799. The cubic root of 520091 is about 80.4192057449.

The spelling of 520091 in words is "five hundred twenty thousand, ninety-one".