522385 has 8 divisors (see below), whose sum is σ = 631296. Its totient is φ = 414960.

The previous prime is 522383. The next prime is 522391. The reversal of 522385 is 583225.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 522385 - 2¹ = 522383 is a prime.

It is a d-powerful number, because it can be written as 5³ + 2⁸ + 3⁵ + 2¹⁷ + 8² + 5⁸ .

It is a Duffinian number.

522385 is a lucky number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (522383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682 + ... + 1228.

It is an arithmetic number, because the mean of its divisors is an integer number (78912).

2⁵²²³⁸⁵ is an apocalyptic number.

It is an amenable number.

522385 is a deficient number, since it is larger than the sum of its proper divisors (108911).

522385 is a wasteful number, since it uses less digits than its factorization.

522385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its digits is 2400, while the sum is 25.

The square root of 522385 is about 722.7620631992. The cubic root of 522385 is about 80.5372691130.

The spelling of 522385 in words is "five hundred twenty-two thousand, three hundred eighty-five".