1151223427 has 2 divisors, whose sum is σ = 1151223428. Its totient is φ = 1151223426.

The previous prime is 1151223401. The next prime is 1151223431. The reversal of 1151223427 is 7243221511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1151223427 - 2⁷ = 1151223299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1151223395 and 1151223404.

It is not a weakly prime, because it can be changed into another prime (1151223457) 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, 575611713 + 575611714.

It is an arithmetic number, because the mean of its divisors is an integer number (575611714).

Almost surely, 2^1151223427 is an apocalyptic number.

1151223427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151223427 is an equidigital number, since it uses as much as digits as its factorization.

1151223427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 1151223427 is about 33929.6835676373. The cubic root of 1151223427 is about 1048.0609495247.

Adding to 1151223427 its reverse (7243221511), we get a palindrome (8394444938).

The spelling of 1151223427 in words is "one billion, one hundred fifty-one million, two hundred twenty-three thousand, four hundred twenty-seven".