522121 has 4 divisors (see below), whose sum is σ = 552852. Its totient is φ = 491392.

The previous prime is 522113. The next prime is 522127. The reversal of 522121 is 121225.

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 440896 + 81225 = 664^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 522121 - 2³ = 522113 is a prime.

It is a super-2 number, since 2×522121² = 545220677282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522127) 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 3 ways as a sum of consecutive naturals, for example, 15340 + ... + 15373.

It is an arithmetic number, because the mean of its divisors is an integer number (138213).

2⁵²²¹²¹ is an apocalyptic number.

It is an amenable number.

522121 is a deficient number, since it is larger than the sum of its proper divisors (30731).

522121 is a wasteful number, since it uses less digits than its factorization.

522121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30730.

The product of its digits is 40, while the sum is 13.

The square root of 522121 is about 722.5794074010. The cubic root of 522121 is about 80.5236996691.

Adding to 522121 its reverse (121225), we get a palindrome (643346).

The spelling of 522121 in words is "five hundred twenty-two thousand, one hundred twenty-one".