1320271705 has 8 divisors (see below), whose sum is σ = 1585082304. Its totient is φ = 1055713200.

The previous prime is 1320271619. The next prime is 1320271727. The reversal of 1320271705 is 5071720231.

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

It is not a de Polignac number, because 1320271705 - 2²¹ = 1318174553 is a prime.

It is a Duffinian 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, 51301 + ... + 72610.

It is an arithmetic number, because the mean of its divisors is an integer number (198135288).

Almost surely, 2^1320271705 is an apocalyptic number.

It is an amenable number.

1320271705 is a deficient number, since it is larger than the sum of its proper divisors (264810599).

1320271705 is a wasteful number, since it uses less digits than its factorization.

1320271705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126047.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 1320271705 is about 36335.5432737698. The cubic root of 1320271705 is about 1097.0365704424.

Adding to 1320271705 its reverse (5071720231), we get a palindrome (6391991936).

The spelling of 1320271705 in words is "one billion, three hundred twenty million, two hundred seventy-one thousand, seven hundred five".