521472 has 72 divisors (see below), whose sum is σ = 1602496. Its totient is φ = 147456.

The previous prime is 521471. The next prime is 521483. The reversal of 521472 is 274125.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521472.

It is not an unprimeable number, because it can be changed into a prime (521471) 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, 5328 + ... + 5424.

2⁵²¹⁴⁷² 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 521472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801248).

521472 is an abundant number, since it is smaller than the sum of its proper divisors (1081024).

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

521472 is an equidigital number, since it uses as much as digits as its factorization.

521472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 109 counting only the distinct ones).

The product of its digits is 560, while the sum is 21.

The square root of 521472 is about 722.1301821694. The cubic root of 521472 is about 80.4903219979.

Adding to 521472 its reverse (274125), we get a palindrome (795597).

The spelling of 521472 in words is "five hundred twenty-one thousand, four hundred seventy-two".