1165281227 has 16 divisors (see below), whose sum is σ = 1314109440. Its totient is φ = 1023700800.

The previous prime is 1165281163. The next prime is 1165281233. The reversal of 1165281227 is 7221825611.

It is a cyclic number.

It is not a de Polignac number, because 1165281227 - 2⁶ = 1165281163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165283227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284063 + ... + 288135.

It is an arithmetic number, because the mean of its divisors is an integer number (82131840).

Almost surely, 2^1165281227 is an apocalyptic number.

1165281227 is a deficient number, since it is larger than the sum of its proper divisors (148828213).

1165281227 is a wasteful number, since it uses less digits than its factorization.

1165281227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4954.

The product of its digits is 13440, while the sum is 35.

The square root of 1165281227 is about 34136.2157685939. The cubic root of 1165281227 is about 1052.3097233526.

The spelling of 1165281227 in words is "one billion, one hundred sixty-five million, two hundred eighty-one thousand, two hundred twenty-seven".