1123420427 has 2 divisors, whose sum is σ = 1123420428. Its totient is φ = 1123420426.

The previous prime is 1123420399. The next prime is 1123420447. The reversal of 1123420427 is 7240243211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123420427 - 2¹² = 1123416331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123420396 and 1123420405.

It is not a weakly prime, because it can be changed into another prime (1123420447) 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 as a sum of consecutive naturals, namely, 561710213 + 561710214.

It is an arithmetic number, because the mean of its divisors is an integer number (561710214).

Almost surely, 2^1123420427 is an apocalyptic number.

1123420427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123420427 is an equidigital number, since it uses as much as digits as its factorization.

1123420427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 1123420427 is about 33517.4645073281. The cubic root of 1123420427 is about 1039.5549214226.

Adding to 1123420427 its reverse (7240243211), we get a palindrome (8363663638).

The spelling of 1123420427 in words is "one billion, one hundred twenty-three million, four hundred twenty thousand, four hundred twenty-seven".