1198121 has 4 divisors (see below), whose sum is σ = 1261200. Its totient is φ = 1135044.

The previous prime is 1198103. The next prime is 1198123. The reversal of 1198121 is 1218911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1198121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1198123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31511 + ... + 31548.

It is an arithmetic number, because the mean of its divisors is an integer number (315300).

2^1198121 is an apocalyptic number.

It is an amenable number.

1198121 is a deficient number, since it is larger than the sum of its proper divisors (63079).

1198121 is an equidigital number, since it uses as much as digits as its factorization.

1198121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63078.

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

The square root of 1198121 is about 1094.5871367781. The cubic root of 1198121 is about 106.2103630698.

The spelling of 1198121 in words is "one million, one hundred ninety-eight thousand, one hundred twenty-one".