1155198 has 32 divisors (see below), whose sum is σ = 2633472. Its totient is φ = 334400.

The previous prime is 1155179. The next prime is 1155211. The reversal of 1155198 is 8915511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1138 + ... + 1898.

It is an arithmetic number, because the mean of its divisors is an integer number (82296).

2^1155198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316736).

1155198 is an abundant number, since it is smaller than the sum of its proper divisors (1478274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155198 is a wasteful number, since it uses less digits than its factorization.

1155198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its digits is 1800, while the sum is 30.

The square root of 1155198 is about 1074.8013769995. The cubic root of 1155198 is about 104.9265699751.

The spelling of 1155198 in words is "one million, one hundred fifty-five thousand, one hundred ninety-eight".