521271 has 12 divisors (see below), whose sum is σ = 797472. Its totient is φ = 326976.

The previous prime is 521267. The next prime is 521281. The reversal of 521271 is 172125.

It is not a de Polignac number, because 521271 - 2² = 521267 is a prime.

It is an Ulam number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521201) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1551 + ... + 1856.

It is an arithmetic number, because the mean of its divisors is an integer number (66456).

2⁵²¹²⁷¹ is an apocalyptic number.

521271 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

521271 is a deficient number, since it is larger than the sum of its proper divisors (276201).

521271 is a wasteful number, since it uses less digits than its factorization.

521271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430 (or 3427 counting only the distinct ones).

The product of its digits is 140, while the sum is 18.

The square root of 521271 is about 721.9909971738. The cubic root of 521271 is about 80.4799790752.

Adding to 521271 its reverse (172125), we get a palindrome (693396).

The spelling of 521271 in words is "five hundred twenty-one thousand, two hundred seventy-one".