1320306771 has 16 divisors (see below), whose sum is σ = 2076796928. Its totient is φ = 730123200.

The previous prime is 1320306769. The next prime is 1320306773. The reversal of 1320306771 is 1776030231.

It is an interprime number because it is at equal distance from previous prime (1320306769) and next prime (1320306773).

It is not a de Polignac number, because 1320306771 - 2¹ = 1320306769 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320306773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1013410 + ... + 1014711.

It is an arithmetic number, because the mean of its divisors is an integer number (129799808).

Almost surely, 2^1320306771 is an apocalyptic number.

1320306771 is a deficient number, since it is larger than the sum of its proper divisors (756490157).

1320306771 is a wasteful number, since it uses less digits than its factorization.

1320306771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028162.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 1320306771 is about 36336.0258008495. The cubic root of 1320306771 is about 1097.0462826715.

The spelling of 1320306771 in words is "one billion, three hundred twenty million, three hundred six thousand, seven hundred seventy-one".