1091241198 has 12 divisors (see below), whose sum is σ = 2364355968. Its totient is φ = 363747060.

The previous prime is 1091241197. The next prime is 1091241209. The reversal of 1091241198 is 8911421901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091241191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30312238 + ... + 30312273.

It is an arithmetic number, because the mean of its divisors is an integer number (197029664).

Almost surely, 2^1091241198 is an apocalyptic number.

1091241198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1091241198 is an abundant number, since it is smaller than the sum of its proper divisors (1273114770).

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

1091241198 is a wasteful number, since it uses less digits than its factorization.

1091241198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60624519 (or 60624516 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1091241198 is about 33033.9400919721. The cubic root of 1091241198 is about 1029.5329512886.

The spelling of 1091241198 in words is "one billion, ninety-one million, two hundred forty-one thousand, one hundred ninety-eight".