1191798 has 24 divisors (see below), whose sum is σ = 2620488. Its totient is φ = 391392.

The previous prime is 1191793. The next prime is 1191809. The reversal of 1191798 is 8971911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 861 + ... + 1767.

It is an arithmetic number, because the mean of its divisors is an integer number (109187).

2^1191798 is an apocalyptic number.

1191798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1191798 is an abundant number, since it is smaller than the sum of its proper divisors (1428690).

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

1191798 is a wasteful number, since it uses less digits than its factorization.

1191798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 985 counting only the distinct ones).

The product of its digits is 4536, while the sum is 36.

The square root of 1191798 is about 1091.6950123546. The cubic root of 1191798 is about 106.0231941650.

It can be divided in two parts, 11 and 91798, that added together give a square (91809 = 303²).

The spelling of 1191798 in words is "one million, one hundred ninety-one thousand, seven hundred ninety-eight".