521797 has 8 divisors (see below), whose sum is σ = 568800. Its totient is φ = 476784.

The previous prime is 521791. The next prime is 521809. The reversal of 521797 is 797125.

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 521797 - 2³ = 521789 is a prime.

It is a Duffinian number.

521797 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521791) 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, 78 + ... + 1024.

It is an arithmetic number, because the mean of its divisors is an integer number (71100).

2⁵²¹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

521797 is a deficient number, since it is larger than the sum of its proper divisors (47003).

521797 is a wasteful number, since it uses less digits than its factorization.

521797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995.

The product of its digits is 4410, while the sum is 31.

The square root of 521797 is about 722.3551757965. The cubic root of 521797 is about 80.5070400077.

It can be divided in two parts, 52 and 1797, that added together give a square (1849 = 43²).

The spelling of 521797 in words is "five hundred twenty-one thousand, seven hundred ninety-seven".