1271920898 has 8 divisors (see below), whose sum is σ = 1936357392. Its totient is φ = 626468436.

The previous prime is 1271920883. The next prime is 1271920919. The reversal of 1271920898 is 8980291721.

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

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 3 ways as a sum of consecutive naturals, for example, 4745840 + ... + 4746107.

It is an arithmetic number, because the mean of its divisors is an integer number (242044674).

Almost surely, 2^1271920898 is an apocalyptic number.

1271920898 is a deficient number, since it is larger than the sum of its proper divisors (664436494).

1271920898 is an equidigital number, since it uses as much as digits as its factorization.

1271920898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492016.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 1271920898 is about 35664.0000280395. Note that the first 4 decimals coincide. The cubic root of 1271920898 is about 1083.4778426135.

The spelling of 1271920898 in words is "one billion, two hundred seventy-one million, nine hundred twenty thousand, eight hundred ninety-eight".