1155312427 has 2 divisors, whose sum is σ = 1155312428. Its totient is φ = 1155312426.

The previous prime is 1155312407. The next prime is 1155312443. The reversal of 1155312427 is 7242135511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155312427 - 2¹⁹ = 1154788139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155312407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577656213 + 577656214.

It is an arithmetic number, because the mean of its divisors is an integer number (577656214).

Almost surely, 2^1155312427 is an apocalyptic number.

1155312427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155312427 is an equidigital number, since it uses as much as digits as its factorization.

1155312427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 31.

The square root of 1155312427 is about 33989.8871283798. The cubic root of 1155312427 is about 1049.3003432671.

Adding to 1155312427 its reverse (7242135511), we get a palindrome (8397447938).

The spelling of 1155312427 in words is "one billion, one hundred fifty-five million, three hundred twelve thousand, four hundred twenty-seven".