1231134427 has 2 divisors, whose sum is σ = 1231134428. Its totient is φ = 1231134426.

The previous prime is 1231134397. The next prime is 1231134439. The reversal of 1231134427 is 7244311321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231134427 - 2⁷ = 1231134299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231134395 and 1231134404.

It is not a weakly prime, because it can be changed into another prime (1231134467) 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, 615567213 + 615567214.

It is an arithmetic number, because the mean of its divisors is an integer number (615567214).

Almost surely, 2^1231134427 is an apocalyptic number.

1231134427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231134427 is an equidigital number, since it uses as much as digits as its factorization.

1231134427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 1231134427 is about 35087.5252333361. The cubic root of 1231134427 is about 1071.7705646557.

Adding to 1231134427 its reverse (7244311321), we get a palindrome (8475445748).

The spelling of 1231134427 in words is "one billion, two hundred thirty-one million, one hundred thirty-four thousand, four hundred twenty-seven".