1198401565 has 16 divisors (see below), whose sum is σ = 1486425600. Its totient is φ = 926573760.

The previous prime is 1198401541. The next prime is 1198401577. The reversal of 1198401565 is 5651048911.

It is not a de Polignac number, because 1198401565 - 2⁹ = 1198401053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123511 + ... + 132859.

It is an arithmetic number, because the mean of its divisors is an integer number (92901600).

Almost surely, 2^1198401565 is an apocalyptic number.

It is an amenable number.

1198401565 is a deficient number, since it is larger than the sum of its proper divisors (288024035).

1198401565 is an equidigital number, since it uses as much as digits as its factorization.

1198401565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10212.

The product of its (nonzero) digits is 43200, while the sum is 40.

The square root of 1198401565 is about 34617.9370413663. The cubic root of 1198401565 is about 1062.1865287939.

The spelling of 1198401565 in words is "one billion, one hundred ninety-eight million, four hundred one thousand, five hundred sixty-five".