1113665281 has 2 divisors, whose sum is σ = 1113665282. Its totient is φ = 1113665280.

The previous prime is 1113665263. The next prime is 1113665321. The reversal of 1113665281 is 1825663111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 853165681 + 260499600 = 29209^2 + 16140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113665281 - 2⁵ = 1113665249 is a prime.

It is a super-2 number, since 2×1113665281² = 2480500716209617922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1113665261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556832640 + 556832641.

It is an arithmetic number, because the mean of its divisors is an integer number (556832641).

Almost surely, 2^1113665281 is an apocalyptic number.

It is an amenable number.

1113665281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113665281 is an equidigital number, since it uses as much as digits as its factorization.

1113665281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 1113665281 is about 33371.6238891667. The cubic root of 1113665281 is about 1036.5372012698.

The spelling of 1113665281 in words is "one billion, one hundred thirteen million, six hundred sixty-five thousand, two hundred eighty-one".