1298881599 has 32 divisors (see below), whose sum is σ = 1858719744. Its totient is φ = 804798720.

The previous prime is 1298881561. The next prime is 1298881643. The reversal of 1298881599 is 9951888921.

It is a Cunningham number, because it is equal to 36040²-1.

It is not a de Polignac number, because 1298881599 - 2⁷ = 1298881471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298881399) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 828114 + ... + 829680.

It is an arithmetic number, because the mean of its divisors is an integer number (58084992).

Almost surely, 2^1298881599 is an apocalyptic number.

1298881599 is a deficient number, since it is larger than the sum of its proper divisors (559838145).

1298881599 is a wasteful number, since it uses less digits than its factorization.

1298881599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927.

The product of its digits is 3732480, while the sum is 60.

The square root of 1298881599 is about 36039.9999861265. Note that the first 4 decimals coincide. The cubic root of 1298881599 is about 1091.0798150882.

The spelling of 1298881599 in words is "one billion, two hundred ninety-eight million, eight hundred eighty-one thousand, five hundred ninety-nine".