998501 has 8 divisors (see below), whose sum is σ = 1158720. Its totient is φ = 842688.

The previous prime is 998497. The next prime is 998513. The reversal of 998501 is 105899.

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

It is not a de Polignac number, because 998501 - 2² = 998497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596 + ... + 1533.

It is an arithmetic number, because the mean of its divisors is an integer number (144840).

2⁹⁹⁸⁵⁰¹ is an apocalyptic number.

It is an amenable number.

998501 is a deficient number, since it is larger than the sum of its proper divisors (160219).

998501 is a wasteful number, since it uses less digits than its factorization.

998501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 998501 is about 999.2502189142. The cubic root of 998501 is about 99.9500083458.

The spelling of 998501 in words is "nine hundred ninety-eight thousand, five hundred one".