522139 has 4 divisors (see below), whose sum is σ = 549640. Its totient is φ = 494640.

The previous prime is 522127. The next prime is 522157. The reversal of 522139 is 931225.

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 522139 - 2¹⁷ = 391067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522199) 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, 13722 + ... + 13759.

It is an arithmetic number, because the mean of its divisors is an integer number (137410).

2⁵²²¹³⁹ is an apocalyptic number.

522139 is a deficient number, since it is larger than the sum of its proper divisors (27501).

522139 is a wasteful number, since it uses less digits than its factorization.

522139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27500.

The product of its digits is 540, while the sum is 22.

The square root of 522139 is about 722.5918626721. The cubic root of 522139 is about 80.5246250038.

The spelling of 522139 in words is "five hundred twenty-two thousand, one hundred thirty-nine".