1211198 has 4 divisors (see below), whose sum is σ = 1816800. Its totient is φ = 605598.

The previous prime is 1211191. The next prime is 1211207. The reversal of 1211198 is 8911121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8911121 = 79 ⋅112799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302798 + ... + 302801.

It is an arithmetic number, because the mean of its divisors is an integer number (454200).

2^1211198 is an apocalyptic number.

1211198 is a deficient number, since it is larger than the sum of its proper divisors (605602).

1211198 is an equidigital number, since it uses as much as digits as its factorization.

1211198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605601.

The product of its digits is 144, while the sum is 23.

The square root of 1211198 is about 1100.5444107350. The cubic root of 1211198 is about 106.5953798861.

It can be divided in two parts, 1211 and 198, that multiplied together give a triangular number (239778 = T₆₉₂).

The spelling of 1211198 in words is "one million, two hundred eleven thousand, one hundred ninety-eight".