1115273281 has 8 divisors (see below), whose sum is σ = 1121369600. Its totient is φ = 1109188080.

The previous prime is 1115273273. The next prime is 1115273303. The reversal of 1115273281 is 1823725111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1115273281 - 2³ = 1115273273 is a prime.

It is a super-2 number, since 2×1115273281² = 2487668982625009922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115273251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266080 + ... + 270238.

It is an arithmetic number, because the mean of its divisors is an integer number (140171200).

Almost surely, 2^1115273281 is an apocalyptic number.

It is an amenable number.

1115273281 is a deficient number, since it is larger than the sum of its proper divisors (6096319).

1115273281 is a wasteful number, since it uses less digits than its factorization.

1115273281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559.

The product of its digits is 3360, while the sum is 31.

The square root of 1115273281 is about 33395.7075235725. The cubic root of 1115273281 is about 1037.0358401020.

Adding to 1115273281 its reverse (1823725111), we get a palindrome (2938998392).

The spelling of 1115273281 in words is "one billion, one hundred fifteen million, two hundred seventy-three thousand, two hundred eighty-one".