521701 has 4 divisors (see below), whose sum is σ = 523404. Its totient is φ = 520000.

The previous prime is 521693. The next prime is 521707. The reversal of 521701 is 107125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 276676 = 495^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 521701 - 2³ = 521693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (130851).

2⁵²¹⁷⁰¹ is an apocalyptic number.

It is an amenable number.

521701 is a deficient number, since it is larger than the sum of its proper divisors (1703).

521701 is a wasteful number, since it uses less digits than its factorization.

521701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 521701 is about 722.2887234341. The cubic root of 521701 is about 80.5021024874.

Adding to 521701 its reverse (107125), we get a palindrome (628826).

The spelling of 521701 in words is "five hundred twenty-one thousand, seven hundred one".