998505 has 12 divisors (see below), whose sum is σ = 1730820. Its totient is φ = 532512.

The previous prime is 998497. The next prime is 998513. The reversal of 998505 is 505899.

It is an interprime number because it is at equal distance from previous prime (998497) and next prime (998513).

It can be written as a sum of positive squares in 2 ways, for example, as 514089 + 484416 = 717^2 + 696^2 .

It is not a de Polignac number, because 998505 - 2³ = 998497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11050 + ... + 11139.

It is an arithmetic number, because the mean of its divisors is an integer number (144235).

2⁹⁹⁸⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

998505 is a deficient number, since it is larger than the sum of its proper divisors (732315).

998505 is a wasteful number, since it uses less digits than its factorization.

998505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22200 (or 22197 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 998505 is about 999.2522204128. The cubic root of 998505 is about 99.9501418124.

The spelling of 998505 in words is "nine hundred ninety-eight thousand, five hundred five".