521248 has 48 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 205056.

The previous prime is 521243. The next prime is 521251. The reversal of 521248 is 842125.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (521243) by changing a digit.

521248 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2823 + ... + 3001.

It is an arithmetic number, because the mean of its divisors is an integer number (26460).

2⁵²¹²⁴⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635040).

521248 is an abundant number, since it is smaller than the sum of its proper divisors (748832).

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

521248 is a wasteful number, since it uses less digits than its factorization.

521248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 201 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 521248 is about 721.9750688216. The cubic root of 521248 is about 80.4787953871.

The spelling of 521248 in words is "five hundred twenty-one thousand, two hundred forty-eight".