1123421147 has 2 divisors, whose sum is σ = 1123421148. Its totient is φ = 1123421146.

The previous prime is 1123421129. The next prime is 1123421171. The reversal of 1123421147 is 7411243211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123421147 - 2⁸ = 1123420891 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123421107) 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 as a sum of consecutive naturals, namely, 561710573 + 561710574.

It is an arithmetic number, because the mean of its divisors is an integer number (561710574).

Almost surely, 2^1123421147 is an apocalyptic number.

1123421147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123421147 is an equidigital number, since it uses as much as digits as its factorization.

1123421147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 1123421147 is about 33517.4752479956. The cubic root of 1123421147 is about 1039.5551435061. Note that the first 3 decimals are identical.

Adding to 1123421147 its reverse (7411243211), we get a palindrome (8534664358).

The spelling of 1123421147 in words is "one billion, one hundred twenty-three million, four hundred twenty-one thousand, one hundred forty-seven".