521441 has 8 divisors (see below), whose sum is σ = 567720. Its totient is φ = 476928.

The previous prime is 521429. The next prime is 521447. The reversal of 521441 is 144125.

It can be written as a sum of positive squares in 4 ways, for example, as 271441 + 250000 = 521^2 + 500^2 .

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 521441 - 2⁶ = 521377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

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 521441.

It is not an unprimeable number, because it can be changed into a prime (521447) 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, 215 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (70965).

2⁵²¹⁴⁴¹ is an apocalyptic number.

It is an amenable number.

521441 is a deficient number, since it is larger than the sum of its proper divisors (46279).

521441 is a wasteful number, since it uses less digits than its factorization.

521441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883.

The product of its digits is 160, while the sum is 17.

The square root of 521441 is about 722.1087175765. The cubic root of 521441 is about 80.4887269941.

Adding to 521441 its reverse (144125), we get a palindrome (665566).

The spelling of 521441 in words is "five hundred twenty-one thousand, four hundred forty-one".