1320272281 has 2 divisors, whose sum is σ = 1320272282. Its totient is φ = 1320272280.

The previous prime is 1320272203. The next prime is 1320272287. The reversal of 1320272281 is 1822720231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1316601225 + 3671056 = 36285^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320272281 - 2⁷ = 1320272153 is a prime.

It is a super-2 number, since 2×1320272281² = 3486237791953885922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1320272287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660136140 + 660136141.

It is an arithmetic number, because the mean of its divisors is an integer number (660136141).

Almost surely, 2^1320272281 is an apocalyptic number.

It is an amenable number.

1320272281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320272281 is an equidigital number, since it uses as much as digits as its factorization.

1320272281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1320272281 is about 36335.5511998924. The cubic root of 1320272281 is about 1097.0367299785.

The spelling of 1320272281 in words is "one billion, three hundred twenty million, two hundred seventy-two thousand, two hundred eighty-one".