1123271643 has 8 divisors (see below), whose sum is σ = 1612902928. Its totient is φ = 691244064.

The previous prime is 1123271609. The next prime is 1123271647. The reversal of 1123271643 is 3461723211.

It is a happy number.

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

It is not a de Polignac number, because 1123271643 - 2⁹ = 1123271131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123271643.

It is not an unprimeable number, because it can be changed into a prime (1123271647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14400880 + ... + 14400957.

It is an arithmetic number, because the mean of its divisors is an integer number (201612866).

Almost surely, 2^1123271643 is an apocalyptic number.

1123271643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1123271643 is a deficient number, since it is larger than the sum of its proper divisors (489631285).

1123271643 is a wasteful number, since it uses less digits than its factorization.

1123271643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28801853.

The product of its digits is 6048, while the sum is 30.

The square root of 1123271643 is about 33515.2449342087. The cubic root of 1123271643 is about 1039.5090270675.

Adding to 1123271643 its reverse (3461723211), we get a palindrome (4584994854).

The spelling of 1123271643 in words is "one billion, one hundred twenty-three million, two hundred seventy-one thousand, six hundred forty-three".