1155378043 has 2 divisors, whose sum is σ = 1155378044. Its totient is φ = 1155378042.

The previous prime is 1155378019. The next prime is 1155378053. The reversal of 1155378043 is 3408735511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155378043 - 2¹³ = 1155369851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1155377993 and 1155378011.

It is not a weakly prime, because it can be changed into another prime (1155378013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577689021 + 577689022.

It is an arithmetic number, because the mean of its divisors is an integer number (577689022).

Almost surely, 2^1155378043 is an apocalyptic number.

1155378043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155378043 is an equidigital number, since it uses as much as digits as its factorization.

1155378043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 1155378043 is about 33990.8523429466. The cubic root of 1155378043 is about 1049.3202079047.

The spelling of 1155378043 in words is "one billion, one hundred fifty-five million, three hundred seventy-eight thousand, forty-three".