1298161185 has 32 divisors (see below), whose sum is σ = 2147376000. Its totient is φ = 669247488.

The previous prime is 1298161153. The next prime is 1298161199. The reversal of 1298161185 is 5811618921.

It is not a de Polignac number, because 1298161185 - 2⁵ = 1298161153 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 52191 + ... + 72939.

It is an arithmetic number, because the mean of its divisors is an integer number (67105500).

Almost surely, 2^1298161185 is an apocalyptic number.

1298161185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1298161185 is a deficient number, since it is larger than the sum of its proper divisors (849214815).

1298161185 is a wasteful number, since it uses less digits than its factorization.

1298161185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20897.

The product of its digits is 34560, while the sum is 42.

The square root of 1298161185 is about 36030.0039550373. The cubic root of 1298161185 is about 1090.8780582997.

The spelling of 1298161185 in words is "one billion, two hundred ninety-eight million, one hundred sixty-one thousand, one hundred eighty-five".