1298871980 has 48 divisors (see below), whose sum is σ = 3154878720. Its totient is φ = 439958208.

The previous prime is 1298871979. The next prime is 1298872021. The reversal of 1298871980 is 891788921.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44270 + ... + 67509.

It is an arithmetic number, because the mean of its divisors is an integer number (65726640).

Almost surely, 2^1298871980 is an apocalyptic number.

1298871980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298871980 is an abundant number, since it is smaller than the sum of its proper divisors (1856006740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1298871980 is a wasteful number, since it uses less digits than its factorization.

1298871980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111878 (or 111876 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 53.

The square root of 1298871980 is about 36039.8665369338. The cubic root of 1298871980 is about 1091.0771217140.

The spelling of 1298871980 in words is "one billion, two hundred ninety-eight million, eight hundred seventy-one thousand, nine hundred eighty".