521071 has 4 divisors (see below), whose sum is σ = 535192. Its totient is φ = 506952.

The previous prime is 521063. The next prime is 521107. The reversal of 521071 is 170125.

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

It is a cyclic number.

It is not a de Polignac number, because 521071 - 2³ = 521063 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 (521021) 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, 7005 + ... + 7078.

It is an arithmetic number, because the mean of its divisors is an integer number (133798).

2⁵²¹⁰⁷¹ is an apocalyptic number.

521071 is a deficient number, since it is larger than the sum of its proper divisors (14121).

521071 is a wasteful number, since it uses less digits than its factorization.

521071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14120.

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

The square root of 521071 is about 721.8524780036. The cubic root of 521071 is about 80.4696849704.

Adding to 521071 its reverse (170125), we get a palindrome (691196).

The spelling of 521071 in words is "five hundred twenty-one thousand, seventy-one".