1155798 has 24 divisors (see below), whose sum is σ = 2862288. Its totient is φ = 330192.

The previous prime is 1155733. The next prime is 1155821. The reversal of 1155798 is 8975511.

1155798 is a `hidden beast` number, since 11 + 557 + 98 = 666.

It is a congruent number.

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, 4461 + ... + 4712.

It is an arithmetic number, because the mean of its divisors is an integer number (119262).

2^1155798 is an apocalyptic number.

1155798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1155798 is an abundant number, since it is smaller than the sum of its proper divisors (1706490).

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

1155798 is a wasteful number, since it uses less digits than its factorization.

1155798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9188 (or 9185 counting only the distinct ones).

The product of its digits is 12600, while the sum is 36.

The square root of 1155798 is about 1075.0804621050. The cubic root of 1155798 is about 104.9447328198.

It can be divided in two parts, 1155 and 798, that added together give a triangular number (1953 = T₆₂).

The spelling of 1155798 in words is "one million, one hundred fifty-five thousand, seven hundred ninety-eight".