1320924281 has 2 divisors, whose sum is σ = 1320924282. Its totient is φ = 1320924280.

The previous prime is 1320924233. The next prime is 1320924287. The reversal of 1320924281 is 1824290231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1200276025 + 120648256 = 34645^2 + 10984^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320924281 - 2⁶ = 1320924217 is a prime.

It is a super-2 number, since 2×1320924281² = 3489681912270733922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1320924287) 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, 660462140 + 660462141.

It is an arithmetic number, because the mean of its divisors is an integer number (660462141).

Almost surely, 2^1320924281 is an apocalyptic number.

It is an amenable number.

1320924281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320924281 is an equidigital number, since it uses as much as digits as its factorization.

1320924281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1320924281 is about 36344.5220218949. The cubic root of 1320924281 is about 1097.2172862290.

The spelling of 1320924281 in words is "one billion, three hundred twenty million, nine hundred twenty-four thousand, two hundred eighty-one".