521130 has 32 divisors (see below), whose sum is σ = 1296000. Its totient is φ = 133952.

The previous prime is 521119. The next prime is 521137. The reversal of 521130 is 31125.

It is not an unprimeable number, because it can be changed into a prime (521137) by changing a digit.

521130 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571 + ... + 1169.

It is an arithmetic number, because the mean of its divisors is an integer number (40500).

2⁵²¹¹³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648000).

521130 is an abundant number, since it is smaller than the sum of its proper divisors (774870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521130 is a wasteful number, since it uses less digits than its factorization.

521130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 521130 is about 721.8933439228. The cubic root of 521130 is about 80.4727220052.

521130 divided by its product of nonzero digits (30) gives a palindrome (17371).

Adding to 521130 its reverse (31125), we get a palindrome (552255).

The spelling of 521130 in words is "five hundred twenty-one thousand, one hundred thirty".