1298198485 has 8 divisors (see below), whose sum is σ = 1611556920. Its totient is φ = 1002746304.

The previous prime is 1298198413. The next prime is 1298198497. The reversal of 1298198485 is 5848918921.

It can be written as a sum of positive squares in 4 ways, for example, as 16630084 + 1281568401 = 4078^2 + 35799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1298198485 - 2⁷ = 1298198357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4476402 + ... + 4476691.

It is an arithmetic number, because the mean of its divisors is an integer number (201444615).

Almost surely, 2^1298198485 is an apocalyptic number.

It is an amenable number.

1298198485 is a deficient number, since it is larger than the sum of its proper divisors (313358435).

1298198485 is an equidigital number, since it uses as much as digits as its factorization.

1298198485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8953127.

The product of its digits is 1658880, while the sum is 55.

The square root of 1298198485 is about 36030.5215754643. The cubic root of 1298198485 is about 1090.8885062477. Note that the first 3 decimals are identical.

The spelling of 1298198485 in words is "one billion, two hundred ninety-eight million, one hundred ninety-eight thousand, four hundred eighty-five".