1198161 has 12 divisors (see below), whose sum is σ = 1757392. Its totient is φ = 786456.
The previous prime is 1198157. The next prime is 1198187. The reversal of 1198161 is 1618911.
It is not a de Polignac number, because 1198161 - 22 = 1198157 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 (1198151) 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 11 ways as a sum of consecutive naturals, for example, 391 + ... + 1596.
21198161 is an apocalyptic number.
It is an amenable number.
1198161 is a deficient number, since it is larger than the sum of its proper divisors (559231).
1198161 is a wasteful number, since it uses less digits than its factorization.
1198161 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2060 (or 2057 counting only the distinct ones).
The product of its digits is 432, while the sum is 27.
The square root of 1198161 is about 1094.6054083550. The cubic root of 1198161 is about 106.2115450226.
The spelling of 1198161 in words is "one million, one hundred ninety-eight thousand, one hundred sixty-one".
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