520101 has 10 divisors (see below), whose sum is σ = 777062. Its totient is φ = 346680.

The previous prime is 520073. The next prime is 520103. The reversal of 520101 is 101025.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 123201 = 630^2 + 351^2 .

It is not a de Polignac number, because 520101 - 2¹³ = 511909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

520101 is a modest number, since divided by 101 gives 52 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520103) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3130 + ... + 3291.

2⁵²⁰¹⁰¹ is an apocalyptic number.

It is an amenable number.

520101 is a deficient number, since it is larger than the sum of its proper divisors (256961).

520101 is an equidigital number, since it uses as much as digits as its factorization.

520101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6433 (or 6424 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 520101 is about 721.1802825924. The cubic root of 520101 is about 80.4197211591.

Adding to 520101 its reverse (101025), we get a palindrome (621126).

The spelling of 520101 in words is "five hundred twenty thousand, one hundred one".