1123281227 has 4 divisors (see below), whose sum is σ = 1124667096. Its totient is φ = 1121895360.

The previous prime is 1123281191. The next prime is 1123281233. The reversal of 1123281227 is 7221823211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1123281227 - 2⁶ = 1123281163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123281227.

It is not an unprimeable number, because it can be changed into a prime (1123281127) 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 3 ways as a sum of consecutive naturals, for example, 691718 + ... + 693339.

It is an arithmetic number, because the mean of its divisors is an integer number (281166774).

Almost surely, 2^1123281227 is an apocalyptic number.

1123281227 is a deficient number, since it is larger than the sum of its proper divisors (1385869).

1123281227 is an equidigital number, since it uses as much as digits as its factorization.

1123281227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385868.

The product of its digits is 2688, while the sum is 29.

The square root of 1123281227 is about 33515.3879136137. The cubic root of 1123281227 is about 1039.5119834987.

The spelling of 1123281227 in words is "one billion, one hundred twenty-three million, two hundred eighty-one thousand, two hundred twenty-seven".