1320023281 has 2 divisors, whose sum is σ = 1320023282. Its totient is φ = 1320023280.

The previous prime is 1320023273. The next prime is 1320023377. The reversal of 1320023281 is 1823200231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1266221056 + 53802225 = 35584^2 + 7335^2 .

It is an emirp because it is prime and its reverse (1823200231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320023281 - 2³ = 1320023273 is a prime.

It is a super-2 number, since 2×1320023281² = 3484922924764009922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1320023261) 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 as a sum of consecutive naturals, namely, 660011640 + 660011641.

It is an arithmetic number, because the mean of its divisors is an integer number (660011641).

Almost surely, 2^1320023281 is an apocalyptic number.

It is an amenable number.

1320023281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320023281 is an equidigital number, since it uses as much as digits as its factorization.

1320023281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1320023281 is about 36332.1246419749. The cubic root of 1320023281 is about 1096.9677595285.

It can be divided in two parts, 13200 and 23281, that added together give a square (36481 = 191²).

The spelling of 1320023281 in words is "one billion, three hundred twenty million, twenty-three thousand, two hundred eighty-one".