1151320243 has 2 divisors, whose sum is σ = 1151320244. Its totient is φ = 1151320242.

The previous prime is 1151320241. The next prime is 1151320249. The reversal of 1151320243 is 3420231511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1151320243 - 2¹ = 1151320241 is a prime.

Together with 1151320241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1151320241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575660121 + 575660122.

It is an arithmetic number, because the mean of its divisors is an integer number (575660122).

Almost surely, 2^1151320243 is an apocalyptic number.

1151320243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151320243 is an equidigital number, since it uses as much as digits as its factorization.

1151320243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1151320243 is about 33931.1102529817. The cubic root of 1151320243 is about 1048.0903287695.

Adding to 1151320243 its reverse (3420231511), we get a palindrome (4571551754).

The spelling of 1151320243 in words is "one billion, one hundred fifty-one million, three hundred twenty thousand, two hundred forty-three".