1298598655 has 8 divisors (see below), whose sum is σ = 1574384112. Its totient is φ = 1028168448.

The previous prime is 1298598647. The next prime is 1298598689. The reversal of 1298598655 is 5568958921.

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 1298598655 - 2³ = 1298598647 is a prime.

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 1298598655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1338277 + ... + 1339246.

It is an arithmetic number, because the mean of its divisors is an integer number (196798014).

Almost surely, 2^1298598655 is an apocalyptic number.

1298598655 is a deficient number, since it is larger than the sum of its proper divisors (275785457).

1298598655 is an equidigital number, since it uses as much as digits as its factorization.

1298598655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677625.

The product of its digits is 7776000, while the sum is 58.

The square root of 1298598655 is about 36036.0743561226. The cubic root of 1298598655 is about 1091.0005836154. Note that the first 3 decimals are identical.

The spelling of 1298598655 in words is "one billion, two hundred ninety-eight million, five hundred ninety-eight thousand, six hundred fifty-five".