1198252129 has 4 divisors (see below), whose sum is σ = 1203395076. Its totient is φ = 1193109184.

The previous prime is 1198252087. The next prime is 1198252177. The reversal of 1198252129 is 9212528911.

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 651627729 + 546624400 = 25527^2 + 23380^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198252129 - 2⁹ = 1198251617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1198252091 and 1198252100.

It is not an unprimeable number, because it can be changed into a prime (1198255129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2571124 + ... + 2571589.

It is an arithmetic number, because the mean of its divisors is an integer number (300848769).

Almost surely, 2^1198252129 is an apocalyptic number.

It is an amenable number.

1198252129 is a deficient number, since it is larger than the sum of its proper divisors (5142947).

1198252129 is an equidigital number, since it uses as much as digits as its factorization.

1198252129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5142946.

The product of its digits is 25920, while the sum is 40.

The square root of 1198252129 is about 34615.7786132278. The cubic root of 1198252129 is about 1062.1423767865.

The spelling of 1198252129 in words is "one billion, one hundred ninety-eight million, two hundred fifty-two thousand, one hundred twenty-nine".