1185428243 has 2 divisors, whose sum is σ = 1185428244. Its totient is φ = 1185428242.

The previous prime is 1185428201. The next prime is 1185428249. The reversal of 1185428243 is 3428245811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1185428243 - 2⁸ = 1185427987 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1185428197 and 1185428206.

It is not a weakly prime, because it can be changed into another prime (1185428249) 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, 592714121 + 592714122.

It is an arithmetic number, because the mean of its divisors is an integer number (592714122).

Almost surely, 2^1185428243 is an apocalyptic number.

1185428243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1185428243 is an equidigital number, since it uses as much as digits as its factorization.

1185428243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 38.

The square root of 1185428243 is about 34430.0485477439. The cubic root of 1185428243 is about 1058.3397062023.

The spelling of 1185428243 in words is "one billion, one hundred eighty-five million, four hundred twenty-eight thousand, two hundred forty-three".