1000198 has 8 divisors (see below), whose sum is σ = 1579320. Its totient is φ = 473760.

The previous prime is 1000193. The next prime is 1000199. The reversal of 1000198 is 8910001.

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

1000198 is a modest number, since divided by 198 gives 100 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000193) 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, 13123 + ... + 13198.

It is an arithmetic number, because the mean of its divisors is an integer number (197415).

2^1000198 is an apocalyptic number.

1000198 is a deficient number, since it is larger than the sum of its proper divisors (579122).

1000198 is a wasteful number, since it uses less digits than its factorization.

1000198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26342.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1000198 is about 1000.0989951000. The cubic root of 1000198 is about 100.0065995644.

Adding to 1000198 its reverse (8910001), we get a palindrome (9910199).

The spelling of 1000198 in words is "one million, one hundred ninety-eight", and thus it is an aban number.