522987 has 4 divisors (see below), whose sum is σ = 697320. Its totient is φ = 348656.

The previous prime is 522961. The next prime is 522989. The reversal of 522987 is 789225.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522987 is a prime.

It is a d-powerful number, because it can be written as 5⁸ + 2¹⁶ + 9³ + 2¹⁶ + 8³ + 7² .

It is a D-number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (522989) 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, 87162 + ... + 87167.

It is an arithmetic number, because the mean of its divisors is an integer number (174330).

2⁵²²⁹⁸⁷ is an apocalyptic number.

522987 is a deficient number, since it is larger than the sum of its proper divisors (174333).

522987 is a wasteful number, since it uses less digits than its factorization.

522987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174332.

The product of its digits is 10080, while the sum is 33.

The square root of 522987 is about 723.1784012261. The cubic root of 522987 is about 80.5681944673.

The spelling of 522987 in words is "five hundred twenty-two thousand, nine hundred eighty-seven".