1198129 has 4 divisors (see below), whose sum is σ = 1200420. Its totient is φ = 1195840.

The previous prime is 1198123. The next prime is 1198133. The reversal of 1198129 is 9218911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 810000 + 388129 = 900^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198129 - 2⁹ = 1197617 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1198129.

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, 69 + ... + 1549.

It is an arithmetic number, because the mean of its divisors is an integer number (300105).

2^1198129 is an apocalyptic number.

It is an amenable number.

1198129 is a deficient number, since it is larger than the sum of its proper divisors (2291).

1198129 is an equidigital number, since it uses as much as digits as its factorization.

1198129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290.

The product of its digits is 1296, while the sum is 31.

The square root of 1198129 is about 1094.5907911178. The cubic root of 1198129 is about 106.2105994625.

The spelling of 1198129 in words is "one million, one hundred ninety-eight thousand, one hundred twenty-nine".