998522 has 24 divisors (see below), whose sum is σ = 1822176. Its totient is φ = 408408.

The previous prime is 998513. The next prime is 998527. The reversal of 998522 is 225899.

It is a nialpdrome in base 10.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998522.

It is not an unprimeable number, because it can be changed into a prime (998527) 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 11 ways as a sum of consecutive naturals, for example, 2033 + ... + 2475.

It is an arithmetic number, because the mean of its divisors is an integer number (75924).

2⁹⁹⁸⁵²² is an apocalyptic number.

998522 is a deficient number, since it is larger than the sum of its proper divisors (823654).

998522 is a wasteful number, since it uses less digits than its factorization.

998522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 475 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 998522 is about 999.2607267375. The cubic root of 998522 is about 99.9507090413.

The spelling of 998522 in words is "nine hundred ninety-eight thousand, five hundred twenty-two".