521297 has 4 divisors (see below), whose sum is σ = 595776. Its totient is φ = 446820.

The previous prime is 521281. The next prime is 521299. The reversal of 521297 is 792125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521297 - 2⁴ = 521281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37229 + ... + 37242.

It is an arithmetic number, because the mean of its divisors is an integer number (148944).

2⁵²¹²⁹⁷ is an apocalyptic number.

It is an amenable number.

521297 is a deficient number, since it is larger than the sum of its proper divisors (74479).

521297 is an equidigital number, since it uses as much as digits as its factorization.

521297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74478.

The product of its digits is 1260, while the sum is 26.

The square root of 521297 is about 722.0090027140. The cubic root of 521297 is about 80.4813171154.

It can be divided in two parts, 521 and 297, that added together give a palindrome (818).

The spelling of 521297 in words is "five hundred twenty-one thousand, two hundred ninety-seven".